Consider flow of a very low pr number fluid (say pr = 0.005) on a heated flat plate. the plate temperature is kept constant at ts. the freestream velocity is uinf and freestream temperature is tinf. starting with the 2d steady state energy equation, simplify it for this low pr flow with clear justification for the simplifications. perform an order of magnitude analysis on the energy equation to develop an expression for local nu for this type of flow.