Experimental investigation in charge superposition principle determination of free convection heat transfer coefficient in aqueous solution containing different concentration of salt around a cylinder with constant heat fluxAuthor(s): Alireza Pakdel*, Sadaf Valinejad
The aimof his research is design of laboratory instrument. So, this investigation provides guidelines for the laboratory tests to measure the free heat transfer coefficient of a cylinder which is released to the environment of different electrolyte solutionswith different concentrations. First, a special laboratory device designed and calibrated to be made. The used electrolyte solution samples of sodium chloride are with different concentrations of 10, 20, 40, 60, 80 and 100%asmass percent. Second, experimental curves are drawn in each case which showNusselt numbers according to Rayleigh number. The obtained results are compared with experimental results obtained by Sir Winston Churchill Cho. The results show a very good approximation. Finally, a newcorrelation for predicting the free convective heat transfer coefficient around the cylinder in electrolyte solutions will be suggested.