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Title: Visualization of natural convection heat transport using heatline method in porous non-isothermally heated triangular cavity
Authors: Varol, Yasin
Öztop, Hakan Fehmi
Mobedi, Moghtada
Pop, Ioan
Keywords: Heatline
Natural convection
Non-isothermal temperature profile
Porous medium
Triangular enclosure
Walls (structural partitions)
Publisher: Elsevier Ltd.
Source: Varol, Y., Öztop, H. F., Mobedi, M., and Pop, I. (2008). Visualization of natural convection heat transport using heatline method in porous non-isothermally heated triangular cavity. International Journal of Heat and Mass Transfer, 51(21-22), 5040-5051. doi:10.1016/j.ijheatmasstransfer.2008.04.023
Abstract: Natural convection heat transfer in a porous media filled and non-isothermally heated from the bottom wall of triangular enclosure is analyzed using finite difference technique. Darcy law was used to write equations of porous media. Dimensionless heatfunction was used to visualize the heat transport due to buoyancy forces. Three different boundary conditions were applied for the vertical and inclined boundaries of triangular enclosures as Case I; both vertical and inclined walls were isothermal, Case II; vertical wall was adiabatic and inclined one was isothermal, Case III; vertical wall is isothermal and inclined one is adiabatic. A cosine function was utilized to get non-isothermal wall condition. The study was performed for different aspect ratios (0.25 ≤ AR ≤ 1.0) and Darcy-modified Rayleigh numbers (100 ≤ Ra ≤ 1000). It was observed that heat transfer enhancement was formed when vertical and inclined walls were isothermal while bottom wall was at non-uniform temperature. Heat transfer from bottom wall did not vary when the value of aspect ratio was higher than 0.50. In addition, heatline visualization technique was a useful technique for non-isothermally heated and porous media filled triangular enclosures. © 2008 Elsevier Ltd. All rights reserved.
ISSN: 0017-9310
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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