A NUMERICAL STUDY OF SINGLE-PHASE FORCED CONVECTIVE HEAT TRANSFER WITH FLOW FRICTION IN MICROCHANNELS

Three-dimensional simulations of the single-phase laminar flow and forced convective heat transfer of water in microchannels with small rectangular sections having specific hydraulicdiameters and distinct geometric configurations were investigated numerically. The numerical resultsindicated that the laminar heat transfer was to be dependent upon the aspect ratio and the ratio of thehydraulic diameter to the center to center distance of the microchannels. The geometries andoperating conditions of that indicated microchannel were created using a finite volume-basedcomputational fluid dynamics technique. The aim of this paper is to obtain computational Nusselt number in laminar flow using Fluent CFD Solver and to validate it with available experimentalstudies. Acquired numerical results have an admissible compatibility with available experimentalstudies. In addition, conceivable temperature profiles and pressure drops have been obtained at each Z-location in this model. Then, pressure drop values in the present model were explored for each Reynolds number. Finally, the effects of geometric parameters on the average Nusselt number in the laminar flow were illustrated numerically

کلیدواژه ها:

Heat transfer ، Pressure drop ، Laminar flow ، CFD ، Nusselt number