Abstract
AbstractThis chapter enters the first part of this thesis, where a relaxation problem is studied and coupled heat and mass transfer exists through cross-diffusion effects. This chapter is devoted to reporting the mass piston effect induced by the cross-boundary mass flux in a binary mixture under supercritical pressures. Mass piston effect is driven by three cooperative or competing mechanisms: boundary velocity, Dufour effect, and concentration variation. A traveling-wave theory is developed to represent the amplitudes of the acoustic wave and the wave’s propagation. Furthermore, in the energy balance analysis, the modified energy and temperature efficiencies measuring the capabilities of the mass piston effect in terms of energy transfer and thermalization are derived.
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