Analysis of dissipation construction in macroenergy and mass transport

Abstract

<p indent="0mm">In this paper, a set of equilibrium equations on the macroenergy-mass transport and the efficiencies of energy-mass transport were proposed based on the linear phenomenological relations and the energy-mass conservation laws to reveal the dissipation mechanism of energy-mass transport. A principle of the action quantity equivalence and a principle of minimum dissipation were presented based on the nonequilibrium state thermodynamics and the energy-mass transport theory to develop a linear dissipation of macroenergy-mass transport. The numerical simulation of inserting the dovetail wing in a tube revealed that at different nondimensional pitches, a low dissipation flow field of longitudinal swirl with multivortexes was formed in the tube. When the Reynolds number is 300–1500 at various insert parameters, thermal transport efficiency exceeds 98.6%, exergy transport efficiency ranges between 84% and 93.2%, power transport efficiency varies from 86.7% to 99.1%, and momentum transport efficiency ranges between 12.3% and 37.5%.