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Entropy generation in nanofluid flow due to double diffusive MHD mixed convection
Priyajit Mondal1, T R Mahapatra1, Rujda Parveen1
1Department of Mathematics, Visva-Bharati (A Central University), Santiniketan - 731 235, West-Bengal, India.
Heliyon
|March 22, 2021
Summary
This study numerically investigates magnetohydrodynamic (MHD) mixed convection in a nanofluid within a trapezoidal enclosure. Results show heat and mass transfer decrease with higher Hartmann numbers and nanoparticle concentrations.
Area of Science:
- Fluid Dynamics
- Heat and Mass Transfer
- Nanofluids
Background:
- Investigates laminar, steady magnetohydrodynamic (MHD) mixed convection flow.
- Analyzes entropy generation in a lid-driven trapezoidal enclosure with a small aspect ratio.
- Focuses on -water nanofluid for enhanced thermal properties.
Purpose of the Study:
- To numerically study fluid flow, heat, and mass transfer rates.
- To analyze entropy generation within the enclosure under specific conditions.
- To explore the impact of various parameters on transport phenomena.
Main Methods:
- Employs second-order finite difference approximation for discretizing governing equations.
- Utilizes a stream-function velocity formulation to solve coupled non-linear partial differential equations.
- Presents results graphically through streamlines, isotherms, and entropy generation plots.
Main Results:
- Average Nusselt and Sherwood numbers decrease with increasing Hartmann number, aspect ratio, and nanoparticle volume fraction.
- Significant alterations in streamlines, temperature, and concentration contours observed at high Richardson numbers.
- Entropy generation is influenced by flow dynamics and thermal-buoyancy forces.
Conclusions:
- The study quantifies the influence of MHD, aspect ratio, and nanoparticle concentration on convective heat and mass transfer.
- Identifies key parameters affecting flow patterns and transport efficiency in the enclosure.
- Provides insights into optimizing heat and mass transfer in nanofluidic systems.
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