| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 652877 | International Communications in Heat and Mass Transfer | 2016 | 10 Pages |
Abstract
The characteristics of flow and heat transfer in microchannel with dimples were numerically investigated. The geometric parameters of dimpled channel, including aspect ratio, dimple depth and dimple spacing, were independently studied under constant Reynolds number 500. A constant heat flux 1Â W/mm2 was adopted in the central area at the bottom of the microchannel heat sink to simulate a high power device. In comparison to straight channels, dimpled surface reduced the local flow resistance and also improved thermal performance of micro-channel heat sink. Compared to flat channel case, the optimal dimpled case has 3.2Â K decrease of temperature, 15% gain of Nusselt number and 2% reduce of pressure drop.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Minghai Xu, Hui Lu, Liang Gong, John C. Chai, Xinyue Duan,