MMAN2700 Chapter Notes - Chapter 1: Mcgraw-Hill Education, Cavitation, Reynolds Number
10 Nov 2020
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A fluid is any material in its liquid or gas form. A solid can resist an applied stress by deforming. A fluid deforms continuously under the influence of an applied stress. The difference between a liquid and a gas is that a liquid generally maintains uniform density and has a defined volume a gas will continue to expand to fill a volume of space. Cengel and cimbala, fluid mechanics: fundamentals and applications, (2nd ed, singapore, mcgraw hill. The "no slip" condition refers to the condition that fluids interacting with solids have zero velocity at the contact point. This is due to the viscosity of the fluid which, when high, is also responsible for creating the boundary layer- the flow region next to the contact point between the solid and the fluid. Density is defined as mass per unit volume. Air at 20 c, = 1. 204 kg/m . Water at 20 c, = 995 kg/m .
