High Quality Content by WIKIPEDIA articles! The Stanton number, St or CH, is a dimensionless number which measures the ratio of heat transferred into a fluid to the thermal capacity of fluid. It is used to characterize heat transfer in forced convection flows. mathrm{St} = frac{h}{c_pcdotrhocdot V} where h = convection heat transfer coefficient = density of the fluid cp = specific heat of the fluid V = velocity of the fluid