CFD MODELING OF MICROCHANNELS COOLING FOR ELECTRONIC MICRODEVICES

Transient cooling of thermoelectric coolers and its applications for microdevices

If a current pulse with a magnitude several times higher than the steady state optimum current is applied to a thermoelectric cooler, an instantaneously lower temperature than that reachable at the steady state can be obtained. Most previous studies of this transient cooling effect focus on the minimum temperature achievable for free standing thermoelectric (TE) elements. In this work, we syste...

CFD-based Study of Velocity Distribution among Multiple Parallel Microchannels

A three-dimensional computational fluid dynamics (CFD) model was used to calculate the velocity distribution among multiple parallel microchannels with triangle manifolds. The influences of structural parameters on velocity distribution among microchannels were analyzed. The simulation results showed that the velocity distribution became more uniform with larger microchannel length, depth or sm...

On-Chip Isotropic Microchannels for Cooling Three Dimensional Microprocessors

Modeling of Dielectrophoresis for Handling Bioparticles in Microdevices

Dielectrophoresis can be used to trap and position bioparticles such as biological cells efficiently and successfully in BioMEMS devices. This paper presents a computational model to simulate this process. In particular, the model will solve for electric potential distribution, bioparticle movement in a Lagrangian frame, Joule heating, and medium flow due to electrothermal effects. As an illust...

Design of cooling fan for noise reduction using CFD

Cooling fans are one of the main noise sources in pumps. Tonal noise produced at a multiple of the rotational frequency of the fan, the so-called blade passing frequency (BPF) and its higher harmonics generally dominate fan noise. Noise reduction is perhaps one of the most important parameter in pumps. Every noise reduction process starts with identification of noise sources and ranking of soun...