Experimental investigation and numerical simulation of fluid flow and heat transfer in microchannels

Toru Yamada, University of Rhode Island

Abstract

This dissertation presents an experimental investigation and numerical simulations of fluid flow and heat transfer in microchannels to study the effects of surface-dominated, non-continuum, multi-scale and multi-physics effects. ^ The experimental study is on the effects of rib-patterned surfaces and surface wettability on liquid flow in microchannels. The effect of rib-patterned surface and its wettability are correlated with friction factor and slip length calculated from the local pressure along the channel length and the results are compared with available predictive equations in the literature. ^ In the numerical part of this dissertation, dissipative particle dynamics (DPD) was utilized to study the following three studies on fluid flow and heat transfer in microchannels. First, a discrete model of red blood cell (RBC) membrane was developed to study the dynamics and deformation of RBC in micro-capillaries. The behavior of the membrane in Poiseuille flow was benchmarked by comparing the DPD results with recent experimental and numerical results in the literature. ^ Forced convection heat transfer in parallel-plate microchannels was simulated using energy conserving DPD (DPDe). The DPDe energy equation was modified for the temperature boundary condition and the model was benchmarked by comparing the results with the exact solutions. ^ DPDe was also utilized to simulate the thermal conductivity of nanofluids. The effects of interfacial thermal resistance between the nanoparticle and base fluid and Brownian motion of nanoparticles were incorporated into the DPDe model. The results are compared with the available experimental and analytical results in the literature.^

Subject Area

Engineering, Mechanical

Recommended Citation

Toru Yamada, "Experimental investigation and numerical simulation of fluid flow and heat transfer in microchannels" (2011). Dissertations and Master's Theses (Campus Access). Paper AAI3487746.
http://digitalcommons.uri.edu/dissertations/AAI3487746

Share

COinS