An inverse optimization of convection heat transfer in rectangle channels with ribbed surface based on the extremum principle of entransy dissipation

摘要: Abstract The ribbed surface is a widely used convection heat transfer enhancement technology. geometric parameters of the have great influences on its performance. It crucial to determine optimum parameters. In present work, optimal arrangement ribs mounted in rectangular channel provided by solving inverse optimization problem with entransy dissipation as objective function. parameter analysis based direct solution firstly carried out get an approximate range near pitch ratio which can provide initial value for problem; afterwards, solved modified simplified conjugate gradient method, and accurate obtained; finally results are discussed detail. indicate that, (1) presented this paper ratio; (2) taking function could lead faster converge process give more stable result than temperature data function; (3) under fixed flux boundary condition slightly larger that condition.