PHED-2116EL Lecture Notes - Lecture 17: Specific Weight, Magnus Effect, Parasitic Drag
14 Dec 2018
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Thus, the relative velocity of the object with respect to the fluid influences the magnitude of the forces acting on the object. The denser and heavier the fluid medium surrounding a body the greater the magnitude of the forces the fluid exerts on the body i. e. its harder to swim through mud than water. The more viscous the fluid medium surrounding a body the greater the magnitude of the forces the fluid exerts on the body i. e. its harder to swim through honey than water. Increasing the pressure of a fluid will increase its density, specific weight and viscosity by concentrating the fluid"s mass into a smaller volume i. e. pressurized air or water is harder to move through. Ideal gas law = pv=nrt: p=pressure in pascals, v=volume in m3, n=number of moles of a gas, r=universal gas constant (8. 31j/mol. k, t=temperature is kelvin (k)
