BERNOULLI’BERNOULLI’S THEORIMS THEORIM

Dr.NARASIMHA REDDYDr.NARASIMHA REDDY

WHAT IS A FLUIDWHAT IS A FLUID??- A substance which moves due to A substance which moves due to

pressure difference between 2 pressure difference between 2 points.points.

- It can be liquid or gas.It can be liquid or gas.- Fluid flow can be steady or Fluid flow can be steady or

nonsteady.nonsteady.- It can be rotational or irrotational.It can be rotational or irrotational.

Contd…Contd…

- It can be compressible or It can be compressible or noncompressible.noncompressible.

- It can be viscous or nonviscous.It can be viscous or nonviscous.

WHAT IS IDEAL FLUIDWHAT IS IDEAL FLUID??

-A -A steady,noncompressible,irrotational,steady,noncompressible,irrotational,nonviscous is ideal fluid.nonviscous is ideal fluid.

WHAT IS WHAT IS LAMINAR LAMINAR FLOWFLOW??

- The particles move The particles move along their own paths along their own paths which will not cross which will not cross the paths of other the paths of other adjacent particles.adjacent particles.

- They move as parallel They move as parallel line to the side of the line to the side of the tube.tube.

WHAT IS WHAT IS TURBULENT TURBULENT FLOWFLOW??

- The paths of The paths of particles cross particles cross eachother & there eachother & there is loss of energy.is loss of energy.

BERNOULLI’S BERNOULLI’S PRINCIPLEPRINCIPLE::

- Daniel Bernoulli Daniel Bernoulli published relationship published relationship of fluid flow in his of fluid flow in his book book HYDRODYNAMICA.HYDRODYNAMICA.

- According to him According to him higher velocities higher velocities produce negative produce negative pressure by their side.pressure by their side.

CLINICAL CLINICAL APPLICATIONSAPPLICATIONS

1.DIFFUSER or 1.DIFFUSER or INJECTOR:INJECTOR:

- A jet of gas or oxygen A jet of gas or oxygen with high pressure is with high pressure is delivered through a small delivered through a small nozzle.nozzle.

- A negative pressure is A negative pressure is created by the side of the created by the side of the jet.jet.

- Ambient air is sucked in.Ambient air is sucked in.- This is called This is called

ENTRAINMENT OF AIR.ENTRAINMENT OF AIR.

2.VENTURI 2.VENTURI METERMETER::

- This is used for - This is used for large volume of large volume of fluid flow.fluid flow.

3.VENTURI 3.VENTURI SUCTIONSUCTION::

- -

4. 4. VENTI VENTI MASKMASK::

- The supply of air The supply of air will give will give 24,28,35,40,50,60% 24,28,35,40,50,60% of O2.of O2.

- At the rate of 2 At the rate of 2 lit/min 38 litres of lit/min 38 litres of air is entrained air is entrained giving 24% O2.giving 24% O2.

5.5.

NEBULISERNEBULISERSS::

- -

6. 6. VENTILATORSVENTILATORS::

HOUSE HOLD HOUSE HOLD APPLICATIONSAPPLICATIONS

Mosquito sprayer.Mosquito sprayer. Garden sprayer.Garden sprayer. Bunsen burner.Bunsen burner. Cooking gas.Cooking gas. Blowing the nose to clear the Blowing the nose to clear the

sinuses.sinuses. Accidents due to fast moving Accidents due to fast moving

vehicles.vehicles.