Entropy generation from convective–radiative moving exponential porous fins with variable thermal conductivity and internal heat generations

Abstract

The performance and thermal properties of convective–radiative rectangular and moving exponential porous fins with variable thermal conductivity together with internal heat generation are investigated. The second law of thermodynamics is used to investigate entropy generation in the proposed fins. The model is numerically solved using shooting technique. It is observed that the entropy generation depends on porosity parameter, temperature ratio, temperature distribution, thermal conductivity and fins structure. It is noted that entropy generation for a decay exponential fin is higher than that of a rectangular fin which is greater than that of a growing exponential fin. Moreover, entropy generation decreases as thermal conductivity increases. The results also reveal that entropy generation is maximum at the fin’s base and the average entropy production depends on porosity parameters and temperature ratio. It is further reveal that the temperature ratio has a smaller amount of influence on entropy as compared to porosity parameter. It is concluded that when the temperature ratio is increases from 1.1 to 1.9, the entropy generation number is also increase by $$30\%$$ 30 % approximately. However, increasing porosity from 1 to 80 gives 14-fold increase in average entropy generation.

Quadratic regression estimation of hybridized nanoliquid flow using Galerkin finite element technique considering shape of nano solid particles

“…The combination of nanomolecules in the basefluid runs to a difference in the characteristics thermophysically. Table 1 summarises the relevant parameters for PENF (Reddy et al, 2014;Din et al, 2022).…”

“…Ahmad et al (Ahmad et al, 2022a) studied the unsteady 3D-bio convective movement of HNFs by an exponentially widening sheet with VTC and chemical reaction. Din et al (Din et al, 2022) assumed the entropy generation from convective released moving exponential porous fins with VTC and interior temperature compeers. For more details see Refs (Akgül et al, 2022;Attia et al, 2022;Ahmad et al, 2022b;Bilal et al, 2022;Qureshi et al, 2022;Safdar et al, 2022).…”

Comparative numerical analysis of magnetized rectangular and trapezoidal fins

“…Using the Runge-Kutta method the effects of magnetic field and convection on radiating radial porous fins have been discussed. 37,38 The performance of the radial fin surface in the presence of a magnetic field to that in the absence of a magnetic field has also been compared in the same articles. A moving porous fin with convex, parabolic, concave, and trapezoidal profiles wetted by a hybrid nanofluid has been studied in detail.…”

“…Sreedevi and Reddy 36 examine the effects of magnetohydrodynamics on fins under various circumstances. Using the Runge–Kutta method the effects of magnetic field and convection on radiating radial porous fins have been discussed 37,38 . The performance of the radial fin surface in the presence of a magnetic field to that in the absence of a magnetic field has also been compared in the same articles.…”

Investigation of Heat Transfer from Convective and Radiative Stretching/Shrinking Rectangular Fins

“…e temperature distribution, radiation, and convection in longitudinal fins with heat transfer and heat generation have been extensively studied [22][23][24]. It is concluded that the temperature at the tip of the fin increases with the decrease in the radiation-conduction parameter and Peclet number with a rise in the heat production gradient.…”