Heat-transfer enhancement in a uniformly heated slot mini-channel due to vortices shed from an adiabatic circular cylinder is numerically investigated. The effects of gap spacing between the cylinder and bottom wall on wall heat transfer and pressure drop are systemically studied. Numerical simulations are performed at , and a blockage ratio of . Results within the thermally developing flow region show heat transfer augmentation compared to the plane channel. It was found that when the obstacle is placed in the middle of the duct, maximum heat transfer enhancement from channel walls is achieved. Displacement of circular cylinder towards the bottom wall leads to the suppression of the vortex shedding, the establishment of a steady flow and a reduction of both wall heat transfer and pressure drop. Performance analysis indicates that the proposed heat transfer enhancement mechanism is beneficial for low-Prandtl-number fluids.
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Mohsen Cheraghi 1; Mehrdad Raisee 1; Mostafa Moghaddami 1
@article{CRMECA_2014__342_2_63_0, author = {Mohsen Cheraghi and Mehrdad Raisee and Mostafa Moghaddami}, title = {Effect of cylinder proximity to the wall on channel flow heat transfer enhancement}, journal = {Comptes Rendus. M\'ecanique}, pages = {63--72}, publisher = {Elsevier}, volume = {342}, number = {2}, year = {2014}, doi = {10.1016/j.crme.2013.12.004}, language = {en}, }
TY - JOUR AU - Mohsen Cheraghi AU - Mehrdad Raisee AU - Mostafa Moghaddami TI - Effect of cylinder proximity to the wall on channel flow heat transfer enhancement JO - Comptes Rendus. Mécanique PY - 2014 SP - 63 EP - 72 VL - 342 IS - 2 PB - Elsevier DO - 10.1016/j.crme.2013.12.004 LA - en ID - CRMECA_2014__342_2_63_0 ER -
Mohsen Cheraghi; Mehrdad Raisee; Mostafa Moghaddami. Effect of cylinder proximity to the wall on channel flow heat transfer enhancement. Comptes Rendus. Mécanique, Volume 342 (2014) no. 2, pp. 63-72. doi : 10.1016/j.crme.2013.12.004. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2013.12.004/
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