In this study, the effects of microchannel number, volume concentration, Reynolds and nanofluid type on heat transfer flow characteristics in sink consisting trapezoidal microchannels are investigated numerically. Governing equations solved by assuming three-dimensional, incompressible, steady laminar flow. The channel material is chosen as copper, a constant flux boundary condition defined upp...

Microchannel heat sink is fabricated on silicon wafer by anisotropic etching, and used Pyrex #7740 as a transparent cover which integrated by anode bonding. Rectangular microchannel presents the flow phenomena of fluid in micro scale, and this study focus on the boundary conditions which hydraulic diameter (Dh) is from 80mm to 530mm and Aspect ratio is from 0.24~7.8 of working fluid (DI water)....

Ratiometric laser induced fluorescence (LIF) thermometry is developed as a tool for temperature measurements using microscale visualization methods. Rhodamine B (RhB) and Rhodamine 110 (Rh110) are used as the temperature-dependent and temperature-independent dyes, respectively. The temperature responses of the two dyes are carefully measured as a function of concentration. The traditional twody...

This paper experimentally and numerically investigated the heat transfer and friction characteristics of microfluidic heat sinks with variously-shaped micro-ribs, i.e., rectangular, triangular and semicircular ribs. The micro-ribs were fabricated on the sidewalls of microfluidic channels by a surface-micromachining micro-electro-mechanical system (MEMS) process and used as turbulators to improv...

the fluid flow and heat transfer in a three-dimensional microchannel filled with al2o3- water nanofluid is numerically investigated. the hybrid scheme is used to discretize the convection terms and simpler algorithm is adopted to couple the velocity and pressure field in the momentum equations. the thermal and flow fields were analyzed using different volume fractions of nanoparticles and diffe...