Question: In heat transfer problems with flowing fluids, frequently the six variables, D, p, h, v, µ, k, may be combined into dimensionless groups which will characterize experimental data. Find these dimensionless groups by inspection with the restriction that h and v only appear in separate terms. D is the diameter, p is the density, v is the velocity, p is the viscosity, h is the heat transfer coefficient and has dimensions Btu/hr ft20F, and k is the thermal conductivity and has dimensions Btuhr ft °F.