Charmiyan, Mahmoud, Hashemi, Amir Mohammad, Joodaki, Ali, Aloui, Fethi. (1405). Stabilizing Taylor-Couette Flow via Temperature Gradients: Critical Thresholds and Heat Transfer Behavior at Various Radius Ratios. هنرهای کاربردی, (), -. doi: 10.22075/jhmtr.2026.39808.1885
Mahmoud Charmiyan; Amir Mohammad Hashemi; Ali Joodaki; Fethi Aloui. "Stabilizing Taylor-Couette Flow via Temperature Gradients: Critical Thresholds and Heat Transfer Behavior at Various Radius Ratios". هنرهای کاربردی, , , 1405, -. doi: 10.22075/jhmtr.2026.39808.1885
Charmiyan, Mahmoud, Hashemi, Amir Mohammad, Joodaki, Ali, Aloui, Fethi. (1405). 'Stabilizing Taylor-Couette Flow via Temperature Gradients: Critical Thresholds and Heat Transfer Behavior at Various Radius Ratios', هنرهای کاربردی, (), pp. -. doi: 10.22075/jhmtr.2026.39808.1885
Charmiyan, Mahmoud, Hashemi, Amir Mohammad, Joodaki, Ali, Aloui, Fethi. Stabilizing Taylor-Couette Flow via Temperature Gradients: Critical Thresholds and Heat Transfer Behavior at Various Radius Ratios. هنرهای کاربردی, 1405; (): -. doi: 10.22075/jhmtr.2026.39808.1885

Stabilizing Taylor-Couette Flow via Temperature Gradients: Critical Thresholds and Heat Transfer Behavior at Various Radius Ratios

Journal of Heat and Mass Transfer Research
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از 26 فروردین 1405
نوع مقاله: Full Length Research Article
شناسه دیجیتال (DOI): 10.22075/jhmtr.2026.39808.1885
نویسندگان
Mahmoud Charmiyan* 1؛ Amir Mohammad Hashemi2؛ Ali Joodaki1؛ Fethi Aloui3
1Ayatollah Boroujerdi University
2University of Tehran
3Université Polytechnique Hauts-de-France
چکیده
This numerical analysis examines how radial temperature gradient influences the stabilization threshold of Taylor-Couette flow across a range of radius ratios (0.77 ≤ η ≤ 0.95). Numerical simulations were conducted for seven radius ratios, with a constant temperature gradient applied between the inner and outer cylinders. The primary objective was to determine the temperature gradient required to stabilize the flow at the threshold of transition from laminar to vortex flow. Velocity contours, vorticity, skin friction coefficient, velocity profiles, and streamlines were analyzed to assess flow stability. The results reveal that the minimum stabilizing temperature gradient occurs at a radius ratio of 0.877, beyond which the required temperature gradient increases significantly. For a radius ratio of 0.77, the Richardson number exceeds 10, leading to flow destabilization due to buoyancy forces. A predictive relationship for the stabilizing temperature gradient as a function of the radius ratio was derived. Additionally, the Nusselt number at the stabilizing temperature gradient was examined, and empirical correlations were provided. The findings highlight the critical role of temperature gradients in controlling flow stability and vortex suppression in Taylor-Couette systems, offering valuable insights for engineering applications.
کلیدواژه‌ها
CFD؛ Taylor-Couette Instabilities؛ OpenFOAM؛ Flow Patterns؛ Heat Transfer
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