PHYS 1201W Chapter Notes - Chapter 14: Intermolecular Force, Reynolds Number
Document Summary
Real fluids in motion have some effects of frictional or viscous forces. Bernoulli"s equation cannot be used when the work done against these dissipative forces is comparable to the total work done on the fluid or to its mechanical energy change. Viscous forces only have effect on fluids not at rest. Viscosity of a fluid is the measure of its resistance to flow under applied force. Greater the viscosity, the larger the force required to maintain the flow, more energy is dissipated. Viscosity is responsible for the drag force experienced by a small object moving slowly through a fluid. Viscous forces determine the velocity of molecules and small particles in a solution in a centrifuge. Defined by considering 2 flat plates separated by a thin fluid layer, lower plate is fixed. A force is required to move the upper plate at a constant speed.
