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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

HEAT TRANSFER BETWEEN A LAMINAR FREE-SURFACE IMPINGING JET AND A COMPOSITE DISK

Get access (open in a dialog) DOI: 10.1615/IHTC9.1660
pages 137-142

Sinopsis

The purpose of the present study is to evaluate the cooling performance of a laminar free-surface liquid jet impinging on a laterally insulated two-layer composite disk heated from below. This arrangement may be a suitable preliminary model for cooling of microelectronic chips which are coated by a protective layer to provide electrical insulation or inhibit erosion damage.
The results demonstrate that, in general, the contact surface temperature increases with increasing thermal resistance of the cover layer. On the other hand, the solid-liquid surface temperature can change drastically with the manner in which the thermal resistance is altered. For a high conductivity cover, the stagnation point temperature increases as the thickness of the top disk is increased. However, the temperature at the radial edge of the disk exhibits an opposing trend. This behavior is reversed with a low conductivity cover. It is also shown that water jet impingement cooling of a heated disk, coated with a protective layer, can be more effective than cooling an uncoated disk with low conductivity dielectric liquids.