Integrated method of measuring the transverse thermal conduction and diffusion in a turbulent liquid stream

Abstract

A new integrated method is described for measuring the transverse diffusion and thermal conductivity coefficients of a parallel turbulent liquid stream. The method differs from other methods in a number of ways: the location of the temperature or impurity-concentration sensors outside and not inside the medium under study; simplicity of implementation; speed of measurements; and applicability to finely divided porous media as well as to large bundles of tubes, lattices, and charges, and to free turbulent streams. On the basis of experimental data we establish a “limiting law of mixing” of a liquid in porous media and the previously known interrelation of turbulent diffusion and thermal conductivity with the hydraulic resistance of the porous medium.