TY - JOUR
AU - Adhikari, S C
AU - Chanda, R K
AU - Akter, R
AU - Mondal, R N
PY - 2023/07/03
Y2 - 2024/06/15
TI - Heat-Flux Effect on Fluid Flow and Convective Heat Transfer through a Rotating Curved Micro-Channel
JF - Journal of Science and Technology Research
JA - J. of Sci. and Tech. Res.
VL - 4
IS - 1
SE - Articles
DO - 10.3329/jscitr.v4i1.67375
UR - https://www.banglajol.info/index.php/JSciTR/article/view/67375
SP - 129-144
AB - <p>The present paper investigates heat-flux effect and the dissemination of energy in a rotating bent square micro-channel (MC) subject to a temperature gradient between the vertical sidewalls. The flow structure prevailing the problem is solved by applying a highly accurate spectral-based numerical scheme. The flow controlling parameters are the Dean number (0<<em>Dn</em>≤5000) and the Taylor number (-500 ≤ <em>Tr </em>≤ 2000) for curvature 0.01 and the Grashof number, <em>Gr</em>=1000. After applying the arc-length path continuation technique to obtain steady solution (SS) curves, two branches of SS consisting of 2- to 8-vortex solutions are prevailed for the non-rotating case while a single branch with a symmetric 2-vortex solution is for positive rotation of the channel. Unsteady flow (UF) properties are simulated by the time-average of the solutions, and the transitional behavior is well predicted by contemplating the power spectrum and phase spaces of the solutions. Results manifest that the UF experiences a consequence ‘steady-state àmulti-periodic àsteady-state’ for no rotation of the channel as <em>Dn </em>is increased. For the rotating case, on the other hand, the flow advances in the scenario ‘steady-state àmulti-periodic àsteady-state’ for negative rotation and only a steady-state solution for rotation in the positive direction. Streamlines and isotherms of SS and UF for various values of the flow-controlling parameters are obtained. Centrifugal force impacts the fluid mixer, which then assists to turn the flow into chaos and prompts to intensify the convective heat transfer (CHT).</p><p>J. of Sci. and Tech. Res. 4(1): 129-144, 2022</p>
ER -