CFD (COMPUTATIONAL FLUID DYNAMICS) BASED HEAT TRANSFER AND FLUID FLOW ANALYSIS OF SOLAR AIR HEATER PROVIDED WITH COMBINATION OF CIRCULAR AND SQUARE SECTION TRANSVERSE RIB ROUGHNESS ON THE ABSORBER PLATE
Author(s):
Dr. Manoj arya , ARUN SHRIVASTAVA
Keywords:
Abstract
The study of heat transfer and fluid flow processes in an artificially roughened solar air heater by using computational fluid dynamics (CFD). The effects of small diameter of circular and square transverse wire rib roughness on heat transfer and fluid flow have been investigated. The Reynolds number, relative roughness pitch (P/e) and relative roughness height (e/D) are chosen as design variables. A 3-D CFD simulation is performed using the ANSYS FLUENT 14.5 code. The Renormalization-group (RNG) k-ε model is selected as the most appropriate one. Results are validated by comparing with available experimental results. It is apparent that the turbulence created by small diameter of transverse wire ribs result in greater increase in heat transfer over the duct. However, the use of artificial roughness results in higher friction losses. The present CFD investigation clearly demonstrates that the average Nusselt number and average friction factor increase with increase in the relative roughness height. The condition for optimum performance has been determined in term of thermal enhancement factor1.39. A maximum value of heat transfer coefficient has been found to be 31.6467 for the range of parameters investigated
Article Details
Unique Paper ID: 150488

Publication Volume & Issue: Volume 7, Issue 7

Page(s): 1 - 6
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Volume 7 Issue 9

Last Date 25 February 2020

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