ENTROPY GENERATION DUE TO NANOFLUID LAMINAR FORCED CONVECTION FLOW THROUGH HEXAGON MICROCHANNEL HEAT SINK

Autor/autori: *A. A. ALFARYJAT, D. STANCIU, A. DOBROVICESCU, A.T, GHEORGHIAN, A. ALHAIDHAWI


Abstract: The effect of using nanofluids SiO2 with water on generated entropy of a hexagon microchannel heat sink (HMCHS) was numerically investigated in this research. Due to the sensitivity of entropy to duct diameter, hexagon microchannel with hydraulic diameters 278 μm were considered. Incompressible laminar flow regime was assumed. Hexagon MCHS using water as a base fluid with nanofluid (SiO2) at volume fraction 4% and nanoparticle 25nm. Obtained results signify that SiO2-H2O at heat flux 500 kw/m2 shows lower entropy generation than pure water. Moreover, when Reynolds number increases, frication entropy generation increases and thermal entropy generation and total entropy generation are decreases.

Keywords: Nanofluids, friction entropy generation, thermal entropy generation, total entropy generation, Microchannel heat sink

 

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