Exjobb2011
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Exjobb: Numerical Simulation of the Flow around a High-Speed Train The current trend in train development is towards faster and lighter trains. These developments cause higher demands on the aerodynamic performance of the train. This includes for example aerodynamic drag, crosswind and slipstream. When designing a high-speed train all of these different aerodynamic phenomena have to be considered. In our group at KTH, we simulate the flow around different ground vehicles, such as trains, cars and trucks, in order to get a deeper understanding of the aerodynamics of these vehicles. We use computational fluid dynamics (CFD) to numerically simulate the flow around the vehicles. We are currently looking for a student to do an exjobb (master thesis) on train aerodynamics. The task of the exjobb would be to evaluate the CFD-software Star-CCM+. Our group how until now been using Star-CD, but have contemplating a switch to CCM+, which are both made by the same company, CD- adapco. The evaluation of CCM+ would start to get familiarized with the code and then do RANS and URANS computations on a high-speed train geometry. These results can be compared to earlier results performed in Star-CD. After that there are numerous options on how to continue, either advanced analyzing techniques of the flow (Proper Orthogonal Decomposition), advanced turbulence modeling (Detached Eddy Simulation), advanced visualization etc. These are things we have experience and knowledge about with Star- CD, but are interested in understanding how well they perform with CCM+. Here we will be interested in your input, both in terms of results from the first part and what would interest you. We are looking for someone with - Background in Fluid Mechanics/ Aerodynamics or equivalent - Basic knowledge of CFD - Fluent writing and speech in English and/or Swedish Contact persons: Tomas Muld Ph.D. student (doktorand) [email protected] 08 – 790 80 15 Gunilla Efraimsson Docent [email protected] 08-790 64 31
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Transcript of Exjobb2011
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Exjobb: Numerical Simulation of the Flow around a High-Speed Train
The current trend in train development is towards faster and lighter trains. These developments cause higher demands on the aerodynamic performance of the train. This includes for example aerodynamic drag, crosswind and slipstream. When designing a high-speed train all of these different aerodynamic phenomena have to be considered.
In our group at KTH, we simulate the flow around different ground vehicles, such as trains, cars and trucks, in order to get a deeper understanding of the aerodynamics of these vehicles. We use computational fluid dynamics (CFD) to numerically simulate the flow around the vehicles. We are currently looking for a student to do an exjobb (master thesis) on train aerodynamics.
The task of the exjobb would be to evaluate the CFD-software Star-CCM+. Our group how until now been using Star-CD, but have contemplating a switch to CCM+, which are both made by the same company, CD-adapco. The evaluation of CCM+ would start to get familiarized with the code and then do RANS and URANS computations on a high-speed train geometry. These results can be compared to earlier results performed in Star-CD. After that there are numerous options on how to continue, either advanced analyzing techniques of the flow (Proper Orthogonal Decomposition), advanced turbulence modeling (Detached Eddy Simulation), advanced visualization etc. These are things we have experience and knowledge about with Star-CD, but are interested in understanding how well they perform with CCM+. Here we will be interested in your input, both in terms of results from the first part and what would interest you.
We are looking for someone with
- Background in Fluid Mechanics/ Aerodynamics or equivalent - Basic knowledge of CFD - Fluent writing and speech in English and/or Swedish
Contact persons:
Tomas Muld
Ph.D. student (doktorand)
[email protected] 08 790 80 15
Gunilla Efraimsson
Docent
[email protected] 08-790 64 31
