Journal of Engineering Science and Technology | |
EFFECT OF VISCOUS HEAT GENERATION ON TEMPERATURE OF RAREFIED GAS MICROFLOWS DRIVEN BY MOVING SURFACE | |
NAM T. P. LE1  THOAI N. TRAN1  | |
[1] Faculty of Mechanical Engineering, Industrial University of Ho Chi Minh City, Vietnam; | |
关键词: Microcavity; New type of Smoluchowski temperature jump condition; Rarefied gas flows; Sliding friction; | |
DOI : | |
来源: DOAJ |
【 摘 要 】
Good understanding of the gas flow under rarefied conditions is important for designing the micro-electro-mechanical systems. The Navier-Stokes-Fourier equations with the slip and jump conditions can capture the rarefied gas flows in the slip regime. In this paper, we focus on evaluating new type of the Smoluchowski jump condition that was recently proposed in our previous work by considering the viscous heat generation. It was validated for external highspeed rarefied gas flows over the stationary surface. Our investigation is undertaken for internal rarefied gas microflows past the moving surfaces. The lid driven microcavity and Couette cases are adopted for this investigation with Knudsen number ranging from 0.05 to 1, the surface velocity varying from 50 m/s to 200 m/s, and argon as working gas. All simulations are run within the OpenFOAM framework. The gas temperatures along the moving surface and those across the microchannel predicted by new type of the Smoluchowski jump condition are close to the DSMC and R13-moment data in all cases considered
【 授权许可】
Unknown