26

   

17

6th Int

‐20 Apr

ternati

S 

ril 2011,

onal W

A MAVR

 Athens

Worksh

RAKOS a

s, Greec

P

hop on

and F

and I K C

e 

ISB

Proce

n Wate

Floatin

CHATJIG

BN: 978‐96

eding

er Wav

g Bodi

Edito

GEORGIO

60‐254‐69

gs 

ves 

ies 

ors: 

OU 

 

94‐9 

 

  

 

Photo in

Shows Athenian410-400 LeNormAcropoliwarshipsat each were useThemistofleet unbattle inSeptemb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

n the cover p

an anaglyphn Trireme (

bc. It was fman and it

is Museum.s with three side. Warshed by the Aocles to de

nder Xerxes n Salamis iber 480 b.c.

page:

h of an an(Triiris). Arfound in 185is exhibite Triremes rows of oarships of this

Athenian Admefeat the Pe

during thein 28 or 2

ncient round 52 by d in were smen type

miral ersian e sea 29 of

i 

 

  

 

The W

 

  

 

 

organizWater W

financ

Σ.Δ

zing comWaves and

cial supp

  

  

  

 

Δ.Ν.Μ.Ε 

mittee od Floatinport prov

 

 

ii 

f the 26tng Bodievided by

th Internes greatlyy the follo

national Wy acknowowing sp

 

 

 

Workshwledges tponsors

 

 

op on the

  

iii  

Forward

The International Workshop on Water Waves and Floating Bodies is an annual meeting of engineers and scientists with a particular interest in water waves and their effects on floating and submerged bodies. The Workshop was initiated by Professor D. V. Evans (University of Bristol) and Professor J. N. Newman (MIT) following informal meetings between their research groups in 1984. First intended to promote communications between workers in the UK and the USA, the interest and participation quickly spread to include researchers from many other countries. In the organization and conduct of the Workshop, particular emphasis is given to the participation of younger researchers, interdisciplinary discussion between engineers and scientists, and the presentation of preliminary work before it is published elsewhere.

Since its inception, the Workshop has grown from strength to strength and annually brings together marine hydrodynamicists, naval architects, offshore and arctic engineers and other scientists and mathematicians, to discuss current research and practical problems. Attendance is restricted to the authors of submitted extended abstracts that are reviewed for acceptance by a small committee. The Proceedings of each Workshop include Introductions with background information, copies of the extended abstracts, and recorded discussions. The proceedings of the previous workshops are available online at www.iwwwfb.org  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

The ConInternatiMetropoSystems also as EFrom anlegacy cBodies. I

Thiswith sevhydrodynextractioacademiaexperienresearchedefinitelydisciplin

TheOdd Marecognizwith emvessels aand hope

In ccombinin Wishing

Spyr

ProfessSpyros A

Works

nference Co-onal Works

olitan Athensof the Natio

Emos peninsucient years Gharacterized It is indeed as year we reveral aspectnamics, wate

on which is aa and indus

nce of seniorers. It is vey enhance in

ne. e 26th Internagnus Faltinszed for his oumphasis on sand liquid sles that he wilconcluding, wng work and

a pleasant st

ros Mav

L

sor Dr.-Ing. A. Mavrakosshop Chair

Chairs and tshop on Was Hotel and onal Technicaula is compl

Greeks were by a relation

a great honor ceived a suffts of hydroder entry, CFDadmittedly brstry. The pror researchersry encouragn the future

national Worsen for his lutstanding coslamming anloshing dynall continue rewe sincerelyfun.

tay to all…

vrakos

Letter fro

s

the local orgater Waves it is organizal Universityetely surrounalways pionen of dependefor us that w

fficient amoudynamics, inD, etc. An areakthrough oceedings in are optimaling that manthe gained s

rkshop of Wlifetime scieontributions nd water entamics. The oesearching, te hope that a

Y

iv 

om the O

ganizing comand Floatin

zed by the Ly of Athens, nded by sea eers in maritience from W

we organize Iunt of abstracncluding, buadequate amotechnology a

nclude 55 sclly combinedny of the auscientific kn

Water Waves entific achievin the scienttry problemrganizing coeaching and i

all attendees

Yours, sincer

Organize

Associate PIoannis K.

Worksh

mmittee woulng Bodies.

Laboratory ofGreece. The having approime activitie

Water Waves WWWFB20

cts from 20 cut not limiteount concernand attracts mcientific word with the muthors are re

nowledge on

and Floatingvements. Protific field of s, body-wav

ommittee is pinspiring studwill pass thr

rely

Y

ers

rofessor Dr.-. Chatjigeorghop Co-Chair

d like to weThis year if Floating StHellenic (G

oximately 16s and establiand interdep

011! countries anded to, fluidns novel conmore and morks in which

momentum oelatively youthat difficul

g Bodies is ofessor Faltinships and of

ve-current inproud to hondents for manree enjoyable

Yannis C

-Eng. giou r 

elcome you tit takes platructures andreek) peninsu

6,000km of cshed a famou

pendence wit

d 4 continentd dynamics, ncepts for waore the intereh the intellig

of sharp-mindung in age. lt but highly

dedicated tonsen is interffshore hydronteractions, hnor Professorny years to ce and memo

Chatjige

to the 26th ace in the d Mooring ula known

coast lines. us nautical th Floating

ts that deal nonlinear

ave energy est of both gence and ded young They will

y attractive

o Professor rnationally odynamics high-speed r Faltinsen come. rable days

eorgiou

  

 

With26th

is d

Professoon slammsloshing theoreticbehave movemedevelopeextensive

At this pFaltinsen

h a great Internat

dedicated

or Faltinsen iming and wdynamics. H

cal and numein waves. T

ents and loaded with colle studies of s

point the orn better, his c

pleasurtional Wd to Prof

s known for ater entry prHe has writterical methodThe so calleds on ships peagues methslamming loa

rganizing comcolleagues an

e the orgWorkshop

fessor Oscientif

Professor

his work in roblems, bodten three texds for explained SFT -Sapresented in hods for anaads.

mmittee withnd students…

v 

ganizing p of Wat

Odd Magnfic achiev

Odd Magnu

ships and ofdy-wave-currxtbooks on thning how shi

alvesen-Faltin1970 is still alyzing the i

hdraws leav….

committer Wavenus Faltvements

us Faltinsen

ffshore hydrorent interactihe subjects. ips, high spensen-Tuck mused as an e

impact of sl

ing space to

ttee annoes and Flinsen for.

n

odynamics wions, high-spProfessor Fed vehicles,

method to eengineering toshing on th

o the people

ounces thloating Br his lifet

with particulapeed vessels altinsen has and offshore

estimate wavtool today. Hhe ships and

e, who know

hat the Bodies, time

ar emphasis and liquid developed

e structures ve induced He has also d he made

w Professor

  

 

Odd Faltcareer 43probablycandidatcommitte

Oddboth hadhis mastmathemaNorwegiMichiganfriends. understointernationational to develo10 Mb drole to bEngineerprofessoArchitecsame timimpact oDepartm

Oddpublishelectures, Hydroelavisiting programas the laCollege Academymembersand assoTrondhe

A

tinsen deserv3 years ago –y those desctes, and at thees on 23 occd grew up ind orienteeringter study at atics. The mian at that tin in 1971. HReturning to

ood that it haonal oil gianaim to particop computer

disk capacity.build nationring and Navr at Civil, b

cture, the batme. These twoon education

ment of Marind Faltinsen hd 3 books (been active

asticity in Mprofessor on

mmes and cenast and most

London andy of Engineships in Norwociate dean, im almost co

A note to

ves to be cele– but the quacribing his ehe age of 67casions at 10

n Stavanger ag as our favoUniversity o

marine technime he wentHis supervisoo Norway and become annts and remacipate in the o

programs fo. The Norwe

nal competenval Architectbut when hettle was closeo colleagues and research

ne Technologas not only p

(translations during morearine Technon 3 continenntre at NTNU

prestigious. d Harbin Eneering and Nrwegian acad

and membeontinuously

o the Odd

ebrated. His pantity and queffort for Ph7 he has ano0 different unand finished rite sport. Buof Bergen hinology comt to USA foror there was

nd his job at n oil nation. Wained on shooil activity, aor calculationgian Institute

nce in offshoture about th

e accepted a ed! Another have had a f

h in naval argy at NTNU wpublished moto Chinese

e than 20 yeaology, been ents. He has U with the Ce

On the interngineering UNational Ac

demies. And er of Board during his ca

vi 

d M. Fal

by C

professional uality of his whD educatioother 10 in tniversities. Bu

high schoolut Odd did nois landscape

mmunity shour his PhD sts professor ODet Norske We could ofore with ourand DNV becn of floater me of Technolore engineerhe leadership

position as outstanding

fruitful cooperchitecture anwithout the t

ore than 300 pand Korean

ars in ITTC, editorial boaralso been in

entre of Excernational sce

University, anademy of Efinally - beliof Director

areer. And th

ltinsen C

Carl M. Lars

life is not onwork is uniquon: He has the pipeline.ut let us startl in 1963. I cot follow up shifted fromuld be grattudy, and deOgilvie, and Veritas he c

f course haver mountains,came one ma

motions on coogy (NTNU ring. We hap. Odd starte

professor inprofessor, T

eration in almnd offshore etwo. papers in jouexist), given

organized cord member fonvolved as lellence on Shene Odd holdnd he is forEngineering ieve it or nors for MARIhe only occa

Celebrati

en

nly long – heue. The mostbeen the m He has beet from the became to knowhis promisin

m forest andteful for thafended his dthey becam

came to a coe opened up , glaciers anajor player inomputers wittoday) was a

ad an internaed his academn marine hy

Torgeir Moanmost 40 yearsengineering.

urnals and intn an unknowonferences likor 4 internatileader or kehips and Oceds honorary reign membeof USA, int - he has beINTEK or oasions he cou

ion

e started his rt impressive

main supervisen member oginning. w him at thang junior cared marshland at choice. Ldegree at Un

me colleaguesountry that reour continen

nd fjords. Bun this game. Oth 256 Kb malso given anal fight betwmic career aydrodynamicn, was appois and have hIt is hard to

ternational cown number ke FAST, PRional journalsey scientist iean Structurepositions at

er/associate on addition toeen head of dother researculd work mo

remarkable figures are sor for 48 of doctoral

at time; we eer. During to applied

Like many niversity of s and close ecently had ntal shelf to ut it was a Odd started

memory and n important ween Civil as associate s at Naval inted at the ad a strong

o imagine a

onferences, of keynote RADS, and s, and been in research es (CeSOS)

University of Chinese o his three department ch units in ore than 24

  

vii  

hours a day are during flights westwards and a Sunday in October when time shifts from daylight saving to normal.

I have had the pleasure of being Odd’s colleague for more than 30 years. I have learned a lot from him, not only on hydrodynamics but also about all aspects of academic work and the role of universities in an international world. I know him as a generous person that always has time for a question and that always will give from his rich experience and wisdom. I have heard numerous stories about academic competition, but Odd is an extraordinary example of academic cooperation. It is a good decision to dedicate the 26th International Workshop on Water Waves and Floating Bodies to Odd Faltinsen.

  

 

I will neProfessoone of moutstandcombina

Conreal. degmonths Michigandocent inknown apromotedwell knoprofessoResearchEngineerUniversistudents.Ukraine,textbookhas also and SlosHe has about 40conferenTechnolo

Conproblemshave beenumericamention Tuck proinvestigaonto theZhao on

ever be ableor. As I oftenmy scientifi

ding researchation makes hncerning his gree in Applihis PhD degn. He startedn Marine Teas Norwegiand to full profown Centre r 3 times 1-yh Institute of ring University College o. He has been, China, Japks: Sea loads

been translahing (2009), authored mo0 keynote a

nces in Trondogy, conferenncerning his s for ships anen hydroelasal methods fsome of his

oduced in 19ations for ext maximum sslamming an

A no

e to call Odn repeat to hiic fathers. Mh contributiohim a unique career: Odd ied Mathemagree in Navd his career

echnology at n University fessor of Mafor Ships a

year periods f Applied Mesity, academiof London. Hn host for abopan, South Ks on Ships anated into Chi

also translatore than 300and honours dheim and isnces that starresearch int

nd offshore ssticity, high-for the seaks research co

970 the strip ttreme impacslamming-innd water-entr

ote for O

d Magnus Fim, someone

My luck is ons in the m

scientist andMagnus Falt

atics at the Ual Architectuat Det Norsthe Norwegof Science a

arine Hydrodand Ocean at the Massa

echanics, Kyuic master at He has educaout 20 researKorea and Und Offshore Sinese and Koted into Chin0 scientific p

lectures. Hs one of therted in Trondterests and astructures is v-speed vehic

keeping of shontributions: theory, still w

cts on flat planduced structry problems

viii 

Odd Mag

by M

Faltinsen by e in the sky mnot only du

marine field,d a wonderfutinsen was bo

University of ure and Marske Veritas (ian Institute and Technol

dynamics. SinStructures (Cachusetts Instushu UniversDalian Univated close torchers (post. USA. Odd Structures (19orean, Hydronese. The lastpublications e has been

e initiators ofdheim. achievementsvery wide ancles and sloships, high sphis coopera

widely used aates highlightural stressesprovided for

gnus Falt

Marilena Gre

his first nammust love meue to Prof. , but also to

ul person. orn in StavanBergen in 19rine Enginee(DNV) from of Technolo

logy, NTNU.nce 2002, he CeSOS) of titute of Techsity, Japan. Hversity of Teo 50 PhD andoc. and proMagnus Fal990), which dynamics of t book is co-ain journals, involved in

f the Boss, F

s: His expernd deep. Imposhing tanks. peed vehicle

ation with Pas practical e

hted the irreles; his long frr instance the

tinsen 

co

me. He is ae very muchFaltinsen’s o his human nger in 1944968 and wasering in 197

1968 to 19ogy in 1974. . In 1976, atis also connTrondheim. hnology, US

He is a honorechnology annd is presentfessors) fromltinsen is this extensively

f high-speed authored by Aconferences

n arranging Fast and Hy

rience in hydortant researcHe has dev

es, and offshProf. Nils Saengineering tevance of hi

friendly coope generalized

and always wh to let me mstrong known qualities.

. He obtaineds able to gain71 at the Un74, and wasThe Univers

t only 32 yeanected to the

He has beeSA, and 3 morary professond visiting ptly supervisinm Croatia, Frhe author ofy used worldmarine vehicAlexander Nand books,

about 10 indroelasticity

drodynamicach topics of h

veloped theohore structuralvesen and Ptool; his hydrigh slammingperation withd Wagner me

will be my meet him as wledge and

This great

d the cand. n in just 16 niversity of s appointed sity is now ars, he was worldwide en visiting onths at the or at Harbin professor at ng 11 PhD rance, Italy, f the three d-wide, and cles (2005)

N. Timokha. and given

nternational in Marine

ally related his activity retical and

res. Just to Prof. Ernie roelasticity g pressures h Dr. Rong ethod, valid

  

ix  

for a wider range of impact angles than the classical Wagner method and recognized as valuable practical engineering tool, other important outcomes have been Boundary Element Methods for slamming and water entry of 2D ship cross-sections and their application within the high-speed nonlinear 2D+1/2 theory; his close cooperation with Prof. Alexander N. Timokha on sloshing problems produced for instance the multimodal method, an efficient and valuable semi-analytical method for analysing 2D and 3D sloshing induced loads on ship tanks for a wide range of filling depths.

Concerning his international acknowledgement: As a result of his profound experience in the marine field, he has been member of 5 International Towing Tank Conferences (ITTC) committees, including 2 as chairman, and 3 International Ship Structure Committees (ISSC). More impressively, he has been named the 15th George Weiblum lecturer (1992-1993) and he is member of the Norwegian Academy for Technical Sciences, Norwegian Academy of Science and Letters, The Royal Norwegian Society of Sciences and Letters, foreign associate of the National Academy of Engineering of the United States of America and foreign member of the Chinese Academy of Engineering.

A person like him that has written forever his signature in the marine field can easily make the others feel uneasy. So you can imagine how I felt the first time I met him, also scared in such a north country. But all these feelings lasted for a very short time. He and Norway opened so many opportunities for my Life that I will never be able to thank them enough.

He is a wonderful teacher. It is thanks to his easy and clear way of communicating if, despite my little knowledge of English, I was able to get the highest grade in Hydro I, well known as one of the most important and difficult exams in our PhD program. He is a great supervisor. He patiently listened to my presentations before conferences to help improving my English and performance, carefully corrected my papers and thesis, and above all shared my studies and research. I have a beautiful memory of him checking with me the probes to use for the water-on-deck experiments, filling a sink with water and then pushing back and forth the probe. He supported me during and after my PhD and I have never finished learning from him. As he likes to tell me, I need to have his every-day preach. I’m just one of his ‘children’ and I can guarantee that every single of his students shares my gratitude, my closeness and my affection to him.

He is a true friend. I received from him so many suggestions for my Life that I could easily make a book by simply listing them. It is amazing to find in him so many qualities: his deep honesty, his modesty, his respect for the people, his care. Once in Rome I sang for him and Bente, his wife, but I never wrote poetry for him. Now, in connection with such a culture heart as Greece, I must try at least to use the poetry to tell a bit about him. I hope he likes the thoughts if not the words.

“Special recipe for a unique mind... baby’s eyes, to be curious of the World, Viking spirit, to disclose firmly the doubts, open ocean, to embrace novel starts… ingredients rare mixed together, softly spiced with modesty and heart…” With affection, marilena…

 

 

 

 

 

  

x  

Committees and Responsible Organizations 

 

 

The Laboratory of Floating Structures and Mooring Systems

School of Naval Architecture and Marine Engineering

National Technical University of Athens

Scientific Committee

Professor Spyros A. Mavrakos, National Technical University of Athens, Greece

Professor Wenyang Duan, Harbin Engineering University, China

Professor Alexander Korobkin, University of East Anglia, UK

Organizing Committee

Professor Spyros A. Mavrakos (Workshop's Chair)

Associate Professor Ioannis K. Chatjigeorgiou (Workshop's Co-Chair)

 

 

 

 

 

 

 

 

  

xi  

The 26th International Workshop on Water Waves and Floating Bodies

Table of Contents

Adcock T.A.A. & Taylor P.H.

On the non-linear evolution of directionally spread wave-groups 1

Aurélien B. & Ferrant P.

Investigation on the radiation and diffraction forces of a bulging tube 5

Bingham H.B. & Christiansen T.B.

High-order finite difference solution of the Euler equations for nonlinear waves 9

Bunnik T. & Toxopeus S.

On the modeling of passing ship effects 13

Chapchap A.C., Chen Y., Temarel P. & Hirdaris S.

Investigation of geometric nonlinear potential flow effects on free surface flows 17

Chen X.B., Duan W.Y. & Liu H.X.

Dissipation effect in potential flows of fairly perfect fluid 21

Chen Y.G., Price W.G. & Temarel P.

An anti-diffusive VOF method for simulation of free surface wave over a bump 25

Crowley S. & Porter R.

Optimal screen arrangements for a tuned liquid damper 29

De Soumen & Mandal B.N.

Transmission of water waves through apertures in a pair of thin vertical barriers 33

Dessi D.

Energy and damping analysis of the wet-modes of an elastic floating structure 37

Edmund D.O., Maki K.J. & Beck R.F.

An improved viscous / inviscid velocity decomposition method 41

Evans D.V. & Newman J.N.

A wave energy converter with an internal water tank 45

Faltinsen O.M.

Hydrodynamic aspects of a floating fish farm with circular collar 49

Greco M., Colicchio G. & Lugni C. Development of a 3D domain-decomposition strategy for violent head-sea wave-vessel interactions: Challenges 53

  

xii  

Grue J.

Damping of oscillatory body-motion at large forward speed 57

Hu C., Liao K. & Duan W. FDM-FEM coupled method for simulation of interaction between free surface and elastic structure 61

Iafrati A.

Energy dissipation mechanisms in wave breaking processes 65

Kashiwagi M., Sasakawa T. & Wakabayashi T.

Hydrodynamic consideration on added resistance and ship-generated unsteady waves 69

Khabakhpasheva T.I. & Korobkin A.A.

Fluid impact onto a corrugated panel with trapped gas cavity 73

Kim T-Y., Kim Y. & Park D-M.

Study on the occurrence of parametric roll in bichromatic waves 77

Kimmoun O., Molin B. & Oikonomidou H.

Wave-drift force on a rectangular barge by a vertical wall 81

Korobkin A.A.

Semi-analytical approach in generalized Wagner model 85

Kristiansen T. & Faltinsen O.M.

Gap resonances analyzed by a domain-decomposition method 89

Kwon S.H., Park C.W., Lee S.H., Shin J.Y., Choi Y.M., Chung J.Y. & Isshiki H.

Deformation of free surface due to a water droplet impact 93

Li Y., Yu Y-H., Previsic M., Nelson E. & Thresher R. Numerical and experimental investigation of a floating point absorber wave energy converter under extreme wave condition 97

Liu S. & Papanikolaou A.

Application of Chimera grid concept to simulation of the free-surface boundary condition 101

Malenica Š., Bigot F., Chen X.B. & Bralic S.

Global hydroelastic model for LNG ships 105

Mavrakos S.A., Chatjigeorgiou I.K., Mazarakos T.P., Konispoliatis D. & Maron A. Hydrodynamic forces and wave run-up on concentric vertical cylinders forming piston-like arrangements 109

Miloh T. & Golkov R.

Active control and cloaking in surface wave diffraction 113

Montiel F., Bonnefoy F., Bennetts L.G., Squire V.A., Ferrant P. & Marsault P. Experimental validation of a linear numerical model for the water wave scattering by a compliant floating disk 117

  

xiii  

Molin B., Kimmoun O. & Remy F.

Slow-drift excitation in varying bathymetry 121

Morgan G.C.J. & Zang J.

Application of open FOAM to coastal and Offshore modelling 125

Mortola G., Incecik A., Turan O. & Hirdaris S.

Large amplitude motions and loads using a non-linear 2D approach 129

Motygin O.V. Well-posed statements of the three-dimensional problem of steady forward motion of bodies 133

Noblesse F., Delhommeau G., Huang F. & Yang C.

Short gravity waves due to a steadily-advancing ship hull 137

Peter M.A. & Meylan M.H. Band structures and band gaps in water-wave scattering by periodic lattices of arbitrary bodies 141

Porter R.

Cloaking of a cylinder in waves 145

Ramachandran G.K.V., Bredmose H., Sorensen J.N. & Jensen J.J.

Response of a TLP floating wind turbine subjected to combined wind and wave loading 149

Read R.W. & Bingham H.B.

Linear wave-structure interaction using overset grids 153

Reinhard M., Korobkin A.A. & Cooker M.J.

Elastic plate impact onto water at high horizontal speed 157

Semenova V.Y. & Yoon B.S.

Cavity flow with vorticity 161

Senjanovic I., Hadzic N., Tomic M. & Malenica S. On consistency of actual restoring stiffness formulations in hydroelastic analysis of marine structures 165

Seo M-G. & Kim Y.

Effects of ship motion on ship maneuvering in waves 169

Shao Y-L. & Faltinsen O.M.

Numerical study of the second-order wave loads on a ship with forward speed 173

Shen J. & Qin H.D.

Tank Green function with partial reflections from side walls 177

Sturova I.V.

The influence of the ice cover on the uniform motion of a submerged sphere 181

  

xiv  

Teng B. & Yang M.D.

Nonlinear coupled dynamic analysis for waves and a moored platform in time domain 185

Toledo Y. Two-dimensional deterministic and stochastic evolution equations for shoaling of nonlinear waves 189

Van Nuffel D., Vepa K.S., De Baere I., Degrieck J., Derouck J. & Van Paepegem W. Parameters affecting the pressure measurement on the surface of a rigid cylindrical body during water slamming impact 193

Vepa K.S., Van Nuffel D. & Van Paepegem W.

Pressure predictions during water entry of a 2D rigid cylinder using SPH method 197

Vicente P.C., de O. Falcao A.F. & Justino P.A.P.

Slack-chain mooring configuration analysis of a floating wave energy converter 201

Williams T.D., Meylan M.H. & Peter M.

Wave forcing of submerged elastic plates 205

Wolgamot H., Eatock Taylor R., Taylor P.H. & Fitzgerald C.J.

The interaction factor for wave power in arrays 209

Yeung R.W., Makasyeyev M.V. & Chloé M. On wave elevations under a moving pressure distribution at minimum-resistance conditions 213

Yoon B.S. & Semenov Y.A.

Asymmetric Impact of a two-dimensional liquid column 217