The model of heat and mass transfer in rough and irrigated ducts

To determine the coefficients of the heat and mass transfer in the ducts with rough and irrigated walls the development of the classical hydrodynamic analogy of the momentum, mass, and energy transfer has been continued. The conservation properties of the skin-friction laws with respect to various disturbances are used for this purpose, and the “effective velocity” is found the value of which enables us to correct the hydrodynamic analogy. The examples of computations of the Nusselt, Sherwood, and Stanton numbers are shown for rough ducts, cooler, and film flow in the counter-flow. A comparison with the results of other researchers is given.