Thermal transport analysis for natural convection in a porous corrugated rhombic enclosure

Abstract

A numerical study of fluid flow and heat transfer, applying natural convection is carried out in a porous corrugated rhombic enclosure. A uniform heating source is applied from the bottom boundary wall while the inclined side walls are maintained to a constant cold temperature and the top corrugated wall is retained at insulated condition inside the enclosure. The heat transfer and flow features are presented for a wide spectrum of Rayleigh numbers (Ra), 104 ≤ Ra ≤ 106, and Darcy numbers (Da), 10−3 ≤ Da ≤ 10−2. The number of undulations (n) for the top and bottom walls have been varied from 1 to 13 keeping the amplitude of undulation fixed. It is revealed that the characteristics of heat transfer are conceivably modulated by changing the parameter of the undulation number on the enclosure walls, specifically at the bottom and top. The influencing control of n in altering the heat transfer rate is felt maximum on the left wall and minimum for the right wall, and there is a strong interplay between Ra and Da together with n on dictating the heat transfer characteristics. The critical value, where heat transfer rate is observed as maximum is at n = 11 and thereafter the values decrease.

Natural convection heat transfer in corrugated annuli with H2O-Al2O3 nanofluid

“…Therefore, it was extensively used in modern heat exchangers applicated in steam generation, condensation in power and cogeneration plants, chemical and agricultural products, automobile industry, etc. [44,45,46,47,48,49,50,51,52,53,54,55,56,57,58]. Hasanuzzamana et al 2007 [44], studied the natural convection in a square cavity having two V-wavy parallel vertical plates and two flat horizontal plates.…”

“…It was observed that increasing the undulations number and buoyancy ratio led to reducing the performance of heat and mass transfer rate. Dutta et al 2020 [57], studied the natural convection in a porous corrugated rhombic cavity. It was noticed that the heat transfer process was indicated by the interaction between Rayleigh number and Darcy number together with a number of undulations.…”

“…Therefore, it was extensively used in modern heat exchangers applicated in steam generation, condensation in power and cogeneration plants, chemical and agricultural products, automobile industry, etc. [ 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ].…”

“…Dutta et al. 2020 [ 57 ], studied the natural convection in a porous corrugated rhombic cavity. It was noticed that the heat transfer process was indicated by the interaction between Rayleigh number and Darcy number together with a number of undulations.…”

Novel insights into the computational techniques in unsteady MHD second‐grade fluid dynamics with oscillatory boundary conditions

“…They calculated the exact solution using separation of variables. More studies about fluids can be seen in References [8‐44].…”