A computer code is being developed to analyze a tem- perature sensor of 12.5-mm diameter experiencing cross flow of water with a free stream temperature of 80°C and variable velocity. Derive an expression for the con- vection heat transfer coefficient as a function of the sen- sor surface temperature Tsfor the range 20 Ts 80°C and for velocities V in the range 0.005 V 0.20 m/s. Use the Zukauskas correlation for the range 40 ReD 1000 and assume that the Prandtl number of water has a linear temperature dependence.