Entropy generation for MHD natural bio-convection in porous cavity filled by a nanofluid containing gyrotactic microorganisms

被引：0

作者：

Omima A. Abo-zaid ^{[1
]}

Mohammed A. Mansour ^{[2
]}

A. Mahdy ^{[1
]}

机构：

[1] South Valley University,Mathematics Department, Faculty of Science

[2] Assiut University,Mathematics Department, Faculty of Science

来源：

Journal of the Brazilian Society of Mechanical Sciences and Engineering | 2025年 / 47卷 / 6期

关键词：

Entropy; Magneto-hydrodynamics; Gyrotactic microorganisms; L-shape enclosure; Obstacles;

D O I：

10.1007/s40430-025-05566-1

中图分类号：

学科分类号：

摘要：

The current contribution emphasizes entropy generation due to bio-convection (Cu + TiO2)/H2O-modified nano-liquid flow through the L-shaped cavity with three obstacles considering the aspect of gyrotactic microorganisms. The active sections of the bottom horizontal and left vertical walls are preserved cool while the other portions of the porous cavity are insulated. The finite method is adopted to simulate the dimensionless PDEs of the model. The results demonstrated how the influence of the bio-convection factors increases the density of motile microorganisms. It has been noted that the local and average heat transmission rates have increased with higher values of the length of cold parts (heat sink), the vertical and horizontal walls' crest lengths, and nanoparticle volume fraction. Large values of the Rayleigh number diminish the thermal performance rate. Entropy generation, local Nusselt and Sherwood numbers, and density of motile microorganisms are also argued.

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