MHD Double-Diffusive and Viscous Dissipative Boundary Layer Flow over a Vertical Plate with Heat Source, Reacting Species, and Thermal and Mass Transfer Gradients
Okuyade Ighoroje Wilson Ata,
Mebine Promise
Issue:
Volume 9, Issue 1, March 2023
Pages:
1-11
Received:
19 February 2023
Accepted:
15 March 2023
Published:
15 June 2023
Abstract: Fluid flow problems with convective boundary conditions have applications in the science and engineering worlds. Specifically, they are relevant in the heating and cooling processes observed in glass fiber production, and aerodynamic extrusion. This paper investigates the problem of steady MHD double-diffusive, viscous dissipative boundary layer flow over a vertical plate with heat source, reacting species, and thermal and mass transfer gradients effects. Usually, the problem of flow through porous media is examined using the Boussinesq’s approximations. The governing nonlinear partial differential equations are coupled and complex. Making them tractable, they are linearized into a set of ordinary differential equations using the similarity transform. The evolving set of ordinary differential equations is solved numerically using the fifth-order Runge-Kutta Fehlberg Method and Maple 21 mathematical computational software. The results obtained for the concentration, temperature, and velocity are presented graphically. The analysis of results shows, amongst others, that an increase in the magnetic field parameter increases the temperature and concentration, but decreases the velocity of the fluid; an increase in the Biot number increases the temperature, concentration, and velocity of the fluid; an increases in the concentration difference parameter increases the temperature, but decreases the concentration and velocity of the fluid; an increase in the Eckert number increases the concentration, but decreases the temperature and velocity of the fluid.
Abstract: Fluid flow problems with convective boundary conditions have applications in the science and engineering worlds. Specifically, they are relevant in the heating and cooling processes observed in glass fiber production, and aerodynamic extrusion. This paper investigates the problem of steady MHD double-diffusive, viscous dissipative boundary layer fl...
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Research Article
Analysis of Water, Ethylene and Propylene Glycol-Based Nanofluids for Optimal Radiator Coolant
Hilder Mary Kisengese,
Winifred Nduku Mutuku,
Kimulu Ancent Makau
Issue:
Volume 9, Issue 1, March 2023
Pages:
12-19
Received:
26 September 2023
Accepted:
14 October 2023
Published:
9 November 2023
Abstract: Convection is the spontaneous movement of fluid phases, either single or multiple, driven by interactions with heterogeneous material properties and body forces such as density and gravity. This movement of heated fluid facilitates heat transfer within a system. Natural convection finds applications in heat dissipation, air conditioning, and microelectronics. However, industrial fluids commonly used for heat transfer, such as minerals, oil, water, and ethylene glycol (EG), face limitations due to their low thermal conductivities, hindering heat exchange efficiency. The production of efficient cost-effective cooling systems for automotive engines is a significant challenge in the automobile industry. Most engines depend on fluid for cooling and therefore use liquid coolants such as ethylene glycol and water, but with poor heat transmission properties. Nanoparticles, which have been shown to improve thermal conductivity, enhance the thermal properties of the fluids. This study compares six different radiator coolants; water-CuO, Propylene-glycol-CuO, ethylene-glycol-CuO, water-MgO, Propylene-glycol-MgO, and ethylene-glycol-MgO. Nanoparticles exhibit improved thermophysical qualities and therefore nanofluids are used as coolants in various mechanical and engineering contexts, including, but not limited to electronics, vehicles, transformers, computers, and electrical devices. The similarity transformation is utilized to non-dimensionalise the governing equations. The resulting equations are solved using a numerical method with the Runge-Kutta fourth-order method. The results show that water-based nanofluids provide the best coolant. However, when the radiator is close to the magnetic field emerging from the automobile engines, copper oxide or Magnesium oxide nanoparticles should be used with water as base fluid.
Abstract: Convection is the spontaneous movement of fluid phases, either single or multiple, driven by interactions with heterogeneous material properties and body forces such as density and gravity. This movement of heated fluid facilitates heat transfer within a system. Natural convection finds applications in heat dissipation, air conditioning, and microe...
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