Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls

Version 1 : Received: 7 June 2021 / Approved: 8 June 2021 / Online: 8 June 2021 (11:09:04 CEST)

How to cite: Saghir, M.Z. Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls. Preprints 2021, 2021060213 (doi: 10.20944/preprints202106.0213.v1). Saghir, M.Z. Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls. Preprints 2021, 2021060213 (doi: 10.20944/preprints202106.0213.v1).

Abstract

Heat enhancement is a topic of great interest nowadays due to its different application in industries. Porous material also known as metallic foam plays a major role in heat enhancement at the expenses of pressure drop. Flow in channels demonstrate the usefulness of this technology in heat extraction. In our current study, a porous strip attached to the channels walls is proposed as an alternative for heat enhancement. The thickness of the porous strip was varied for different Reynolds number. By maintaining laminar regime and using water as fluid, we determined an optimum thickness of porous material leading to the highest performance evaluation criterion. In our current study with the aspect ratio being the porous strip thickness over the channel width, an aspect ratio of 0.2 is found to be the alternative. A 40% increase in heat enhancement is detected in the presence of porous strip when compared to a clear channel case for a Reynolds number equal to 200 and improve further as the Reynolds number increase accordingly.

Subject Areas

Rectangular channels; Twisted tape inserts; Laminar flow; Forced convection; Water; Heat enhancement; Pressure drop; Performance evaluation criteria

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