Subject: Fluids Mechanics Topic: Units and Dimensions ************************************************************** Starting from the following free body diagram of a differential fluid element...

Starting from the following free body diagram of a differential fluid element represented initially by points in a square (A, B,C,D) with sides length dx dy. The square is initially moving at speed ua. During time dt, the fluid is also undergoing shear, and at a time dt later the points are in the arrangement below. What are the dimensions and SI units of the following quantities in terms labeled 1-8 shown below? Use the symbol for dimensionless. Derive an equation for the rate of change of strain angle theta. du US dB do dA dt i,A dt du dB dt