Computational Fluid Dynamics Analysis for Heat Transfer Enhancement in Single Horizontal Pipe Heat Exchanger Full Filled Using Different Types of Porous Material
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Abstract
As a result of significant scaling challenges and complex engineering, there has been considerable academic interest in recent years in the use of porous materials to improve forced convection heat transfer. The current work involves computational fluid dynamics (CFD) numerical simulation using three types of porous material (glass, steel and ceramics) with different diameters (0.004, 0.006 and 0.005 m), respectively to optimize heat transfer for a concentric single-tube heat exchanger with a length (1 m) and a diameter (0.03 m) exposed uniform heat flux on the outer wall (60kW/m2). The governing equations of steady single-phase turbulent flow were solved using the commercial program (Ansys Fluent) for the Reynolds number range (10000-19000). Under the same operating conditions, the four cases of the heat exchanger tests were carried out, namely the three cases of the porous medium plus the exchanger without the porous medium. The numerical results showed the heat transfer rate (Nusselt number) improved by (92.563%) when using the porous material ceramic type compared to the empty pipe, while using the porous material (glass and steel) percentage increased (91.44 and 87.86%), respectively. Moreover, the friction factor may be affected by the inclusion of the porous material, and by increasing the Reynolds number gradually decreases. The current study proposes the inclusion of nanomaterials as a composite technology with porous material to improve the heat transfer properties and the flow of various fluids through the heat pipe.
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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