電子零件冷卻及材料製程 – 微熱傳增強研究室

電子零件冷卻及材料製程

在八○年代,電子零件冷卻問題引起學者及研究者之注意,因為電子計算機及家用電腦正方興未艾,另外,材料製程特別是非傳統之雷射加工等論題也是廣受研究者之興趣,這一方面的相關工作,本研究室也曾參與過,其中具代表性的著作請見附件

Laminar fored convection from Surface-mounted ribs

Author
Source
Abstract
SHOU-SHING HSIEH, HUEI-JAN SHIH and YING-JONG HONG
International Journal of Heat and Mass Transfer, Vol.33,No.9,pp.1987-2000,1990
A study for both numerical and experimental aspects on low speed forced convective heat transfer near two-dimensional transverse ribs in which the walls are held at a uniform temperature is presented. The effects of aspect ration and Reynolds number as well as the initial boundary layer thickness are examined and discussed. The numerical technique is based on a power law combined with a false stream function- vorticity form. It is found that the temperature data agree reasonable well with those taken from the experiments qualitatively. The results are further correlated by an equation of the form.

Numerical Computation of Laminar Separation and Reattachment of Flow Over Surface Mounted Ribs

Author
Source
Abstract
YING-JONG HONG , SHOU-SHING HSIEH , HUEI-JAN SHIH
ASME Journal of Fluids Engineering, Vol.113,No.2,1991,pp.190-198
Numerical results are presented concerning the fluid characteristics of steady-state laminar flow over surface mounted ribs. Computations are carried out using a false transient stream function- vorticity form. The effects of the aspect ratios (width-to-depth) of the ribs and Reynolds numbers as well as initial boundary-layer thickness on entire flow field, separated region, and reattachment length are presented and discussed. The computed reattachment distance compares reasonably well with those data reported by previous studies. A correlation is provided in terms of the rib aspect ration, Reynolds number , and the ratio of boundary-layer thickness and rib height. The pressure drop is excessive along the upstream vertical step face and it recovers thereafter, which agrees qualitatively with those of the previous studies for the flow over backward-facing steps.