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11 Cards in this Set
- Front
- Back
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1 litre-0.001m³ |
Remember the multiplication of SI units gives SI units |
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Tau(shear stress)=dynamic viscosity*velocity gradient |
Viscosity is the shear stress required to produce unit rate of shear strain |
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If viscosity is given in poise it must be divided by 10 to get it's equivalent numerical value |
Kinematic viscosity=viscosity/density (m²/s) |
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Tangential speed of shaft= πDN/60 |
cm²/s = stoke m²/s Stoke - 10000 m²/s m²/s-10000stoke |
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When using the velocity profile to solve , remember the boundary conditions. Ax²+by+c U,Y==0 U,Y original position Differentiation |
Bulk modulus= increase of pressure/volumetric strain |
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Surface tension |
Liquid droplets P=(4 x surface tension)/diameter Hollow bubble P=( 8*surface tension)/d Liquid jet P= surface tension x 2lenght/length x diameter |
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Capillarity depends on weight, diameter, surface tension |
Capillary rise: h= 4 x surface tension/density xgravityx diameter
Capillary fall: h= 4 surface tension x costheta/density xgravity |
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Total pressure/force=density x gravityxarea x c.g |
Center of pressure= If /Ac.g + c.g |
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Pressure head= Pressure/unit weight |
H |
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Bernoulli equation states that in an ideal , incomprehensible fluid when the flow is steady and continuous, the sum of pressure energy, kinetic energy and potential energy is constant along a stream line. |
Assumptions made for Bernoulli equation: Liquid is ideal and incompressible Steady and continuous flow Along a stream line (one dimensional) Only gravity and pressure forces |
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Inertia: measure of how difficult it is to change the velocity |
Viscosity, internal friction |
