Sensitivity study on convective heat transfer in a driven cavity with star-shaped obstacle and hybrid nanofluid using response surface methodology

被引:2
作者
Ziaur, R. M. [1 ]
Azad, A. K. [2 ]
Rahman, M. M. [1 ]
机构
[1] Bangladesh Univ Engn & Technol, Dept Math, Dhaka 1000, Bangladesh
[2] Islamic Univ Technol IUT, Dept Nat Sci, Gazipur 1704, Bangladesh
关键词
Sensitivity analysis; Response surface methodology (RSM); Hybrid nanofluids; Magnetohydrodynamics (MHD); Lid-driven cavity; Star-shaped obstacle; g gravitational acceleration /i thermal expansion coefficient; MHD NATURAL-CONVECTION; MIXED CONVECTION; ENTROPY GENERATION; MAGNETIC-FIELD; SQUARE CAVITY; POROUS CAVITY; FLOW; HALL; ENHANCEMENT; SIMULATION;
D O I
10.1016/j.heliyon.2024.e37440
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Sensitivity analysis is significant for understanding and measuring the impact of various parameters and input variables on heat transfer phenomena. The main objective of the current work is to examine the sensitivity of a numerical analysis of mixed convection in a lid-driven square cavity with a magnetic field. The cavity also contains a heated, star-shaped obstacle and is filled with a hybrid nanofluid. The sensitivity analysis was conducted employing the statistical response surface methodology (RSM), while the numerical simulations used the Galerkin weighted residual finite element approach to solve the governing PDEs. The study investigates the impacts of four dimensionless factors: Ri, Re, Ha, and Phi. The numerical observation was made that there exists an upward trend between the average heat transfer rate with Ri, Re, and Phi, while there exists a downward trend with Ha. Furthermore, the average heat transfer rate increases by almost half (49.54 %) when Phi increases from 1 % to 10 % and decreases by 5.97 % when the Ha increases from 0 to 60. Finally, the statistical investigation of the current model and testing techniques imply that R-2 values for the response function are high (98.72 %), suggesting that this model is appropriate for estimating Nu.
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页数:24
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