Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Flow Uniformization in Parallel Microchannel Heatsink
Submission Author:
Alan Lugarini de Souza , PR , Brazil
Co-Authors:
Alan Lugarini de Souza, Admilson Franco
Presenter: Alan Lugarini de Souza
doi://10.26678/ABCM.COBEM2017.COB17-0523
Abstract
The distribution of flow through parallel microchannels is a difficult task when it comes to equating the flow rate in each branch. Flow uniformization reduces thermal stresses and increases heatsink performance. The most usual way of overcoming this problem is using inlet plenums, which consists of a large manifold area attached to the parallel microchannels, with curved or stepped outer wall. This type of manifold occupies a large space and present a challenge for compactness. In the present paper, a duct with constant cross-section is employed as manifold, and the flow distribution uniformization is achieved by varying the widths of the parallel microchannels. All channels have rectangular cross-section. The constraints of the heatsink system are the total duct volume and the area. Results show that this arrangement has relatively low nonuniformity when used with constant widths. With variable widths, the heatsink performance is slightly increased. A practical correlation is given for determining the widths distribution.
Keywords
microchannel heat sink, parallel microchannels, flow uniformization
