Heat transfer in microchannel devices using DSMC

Liou, William W.; Fang, Yichuan

doi:10.1109/84.925780

Cited by 84 publications

(68 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3, it is very encouraging to observe that for the diffuse reflection case, good agreement is obtained as the velocity profiles are compared with those presented by Le and Hassan (2006) and Le and Esmail (2007). Nevertheless, at section X = 0.0, a small difference in the velocity profiles is observed as the solution is compared with DSMC results reported by Liou and Fang (2001). It should be mentioned in this context that DSMC calculations presented by Liou and Fang (2001) correspond to a mesh with 6,000 cells, with a total of 11,854 simulated molecules.…”

Section: Velocity Profilessupporting

confidence: 51%

“…3 and 4, respectively. In this set of plots, velocity ratio stands for the streamwise velocity u normalized by the freestream velocity U ∞ , X is the length x normalized by the microchannel length L, and Y is the height y normalized by the microchannel H. In addition, for comparison purpose, the velocity profiles obtained by Liou and Fang (2001), Le and Hassan (2006) and Le and Esmail (2007) are also presented.…”

Section: Velocity Profilesmentioning

confidence: 99%

“…Freestream flow conditions used for the numerical simulations are those given by Liou and Fang (2001) and Le and Hassan (2006), and summarized in Tab. 1.…”

Section: Freestream and Flow Conditionsmentioning

confidence: 99%

“…According to the current literature, a great deal of studies (Alexeenko et al, 2003;Barber and Emerson, 2002;Cai and Boyd, 2007;Kaplan and Oran, 2002;Lilly et al, 2007;Liou and Fang, 2001;Oh et al, 1997;Sayegh et al, 2004) has been carried out in the last decades on microchannels. The major interest in these studies has gone into predicting the fluid behavior within microchannels.…”

Section: Introductionmentioning

confidence: 99%

“…The impact of the Knudsen number on the heat transfer of a supersonic flow in microchannels was examined by Liou and Fang (2001) by using the DSMC method. They found that the heat transfer to the isothermal wall increased significantly with the Knudsen number.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Gas–surface interaction effects on the flowfield structure of a high speed microchannel flow

Sebastião

Santos

2013

Applied Thermal Engineering

View full text Add to dashboard Cite

Abstract. This work describes a computational study on supersonic flow in a microchannel composed of two parallel plates. Effects of incomplete surface accommodation on the flowfield structure have been investigated by employing the Direct Simulation Monte Carlo (DSMC) method in combination with the Cercignani-Lampis-Lord (CLL) gas-surface interaction model. The aim of this work is to investigate the disturbance developments due to differences in the accommodation coefficients on the lower and upper surfaces of the microchannel. The results presented highlight the sensitivity of the primary properties to changes on the gas-surface accommodation coefficients. It is found that accommodation coefficients have different influence on velocity, density, pressure and temperature for the conditions investigated.

show abstract

Section: Velocity Profilessupporting

confidence: 51%

Section: Velocity Profilesmentioning

confidence: 99%

“…Freestream flow conditions used for the numerical simulations are those given by Liou and Fang (2001) and Le and Hassan (2006), and summarized in Tab. 1.…”

Section: Freestream and Flow Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Gas–surface interaction effects on the flowfield structure of a high speed microchannel flow

Sebastião

Santos

2013

Applied Thermal Engineering

View full text Add to dashboard Cite

show abstract

Finite Volume Simulation of Supersonic to Hypersonic Gas Flow and Heat Transfer through Microchannels

Chaudhuri¹,

Guha²,

Dutta³

2006

Chem Eng & Technol

View full text Add to dashboard Cite

The heat transfer characteristics of supersonic to hypersonic gas flow in microchannels are numerically studied by solving a two-dimensional Navier-Stokes (NS) system of equations utilizing Maxwell's velocity slip with thermal creep, and a corresponding temperature jump relationship derived by von Smoluchowski. An explicit Finite Volume (FV) solver has been developed using modified advection upwind splitting methods (AUSM+) to simulate the high speed microscale gas flow. The influence of the inlet Mach number on overall hydrodynamics and heat transfer is also studied. The supersonic test case has been compared with the Direct Solution Monte Carlo (DSMC) and Finite Element (FE) results available in the literature. The study of high speed flow through microchannels demonstrates an increase in temperature due to the wall friction and that fluid flow decelerates throughout the microchannels. The wall temperature jump and the centerline temperature are higher for larger inlet Mach numbers.

show abstract

Heat‐flux‐specified boundary treatment for gas flow and heat transfer in microchannel using direct simulation Monte Carlo method

Wang

Yan

2007

Numerical Meth Engineering

View full text Add to dashboard Cite

SUMMARYDirect simulation Monte Carlo (DSMC) method has been widely used to study gaseous flow and heat transfer in micro-fluidic devices. For flows associated with microelectromechanical systems (MEMS), the heat-flux-specified (HFS) boundary condition broadly exists. However, problems with HFS boundary have not been realized in the simulation of microchannel flows with DSMC method. To overcome this problem, a new technique named as inverse temperature sampling (ITS) is developed. This technique provides an approach to calculate the molecular reflective characteristic temperature from the specified heat flux at the wall boundary. Coupling with DSMC method, the ITS technique can treat the HFS boundary condition in DSMC method for both simple gas and gas mixtures. For validation, heat flux obtained from twodimensional Poiseuille flows with wall-temperature-specified (WTS) boundary condition is employed as the initial thermal boundary condition of our new method. Sampled wall temperature by the ITS method agrees well with the expected value. Pressure, velocity and temperature distributions under these two thermal boundary conditions (WTS and HFS) are compared. Effects of molecule collision model and gas-surface interaction model are also investigated. Results show that the proposed ITS method could accurately simulate gaseous flow and heat transfer in MEMS.

show abstract

Heat transfer in microchannel devices using DSMC

Cited by 84 publications

References 3 publications

Gas–surface interaction effects on the flowfield structure of a high speed microchannel flow

Gas–surface interaction effects on the flowfield structure of a high speed microchannel flow

Finite Volume Simulation of Supersonic to Hypersonic Gas Flow and Heat Transfer through Microchannels

Heat‐flux‐specified boundary treatment for gas flow and heat transfer in microchannel using direct simulation Monte Carlo method

Contact Info

Product

Resources

About