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Mohammed Y. Jabbar

Bio: Mohammed Y. Jabbar is an academic researcher from University of Babylon. The author has contributed to research in topics: Nusselt number & Cylinder. The author has an hindex of 3, co-authored 9 publications receiving 29 citations.

Papers
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TL;DR: In this article, numerical Galerkin Finite Element Method (GFEM) is applied for conjugate heat transfer of a rotating cylinder immersed in Fe3O4-water nanofluid under the heat-flux and magnetic field.
Abstract: In this paper, numerical Galerkin Finite Element Method (GFEM) is applied for conjugate heat-transfer of a rotating cylinder immersed in Fe3O4-water nanofluid under the heat-flux and magnetic field. The outer boundaries of the cavity were maintained at low temperatures while beside the cylinder were insulated. It is assumed that the cylinder rotates in both clockwise and counter-clockwise directions. The dimensionless governing equations such as velocity, pressure, and temperature formulation were analyzed by the GFEM. The results were evaluated using the governing parameters such as nanoparticles (NPs) volume fraction, Hartmann and Rayleigh numbers, magnetic field angle and NPs shapes. As a main result, the average Nusselt number increases by increasing the NPs volume fraction, inclination angle and thermal conductivity ratios, while increasing the Hartmann number decreased the Nusselt number. Furthermore, platelet NPs had the maximum average Nusselt number and spherical NPs made the minimum values of Nusselt numbers among examined NPs shapes.

22 citations

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TL;DR: In this article, the effect of the presence of inclined centered baffle and corrugation frequency on the steady natural convection in a sinusoidal corrugated enclosure was investigated.

12 citations

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TL;DR: In this article, the authors investigated convective heat transfer in a porous cavity conjugated with an active rotating cylinder, where the rotating active cylinder is positioned in such a way conveying heat from the cavity and discharging it outside.
Abstract: Convective heat transfer in a porous cavity conjugated with an active rotating cylinder is investigated in this paper. Copper–water nanofluid fills the porous cavity. The rotating active cylinder is positioned in such a way conveying heat from the cavity and discharges it outside. The vertical walls of the cavity are thermally insulated while the bottom wall is moving to the right and kept at a constant high temperature. The governing equations are facilitated with the ability to study the tilt of the cylinder-cavity assembly. The effects of Richardson number, Darcy number, inclination angle, conductivity ratio, rotational speed, and nanofluid volume fraction are studied at a constant Rayleigh number of 105. Galerkin finite element method of weak formulation is used to solve the dimensionless governing equation with appropriate boundary conditions. Darcy–Brinkman–Forchheimer model is adopted to govern the flow inside porous medium. Results show that the rotation of the cylinder can enlarge the average Nusselt number more than 223%, while ten times increase of thermal conductivity ratio amplifies Nusselt number by 136%. It is also found that the Richardson number plays an adverse role on the average Nusselt number. Physical explanations and thorough validations are given in the paper.

9 citations

Journal ArticleDOI
TL;DR: In this paper, a laminar free convection in an enclosure forming by a hot inner circular cylinder and cold sinusoidal outer cylinder at different amplitude (λ=1, 2, and 4) and Rayleigh Number range (103-106) is numerically studied.
Abstract: Received: 20 April 2019 Accepted: 16 December 2019 It is necessary for the heat transfer problems to provide information about the critical parameters that affect the efficiency to improve the status of the system. Major part of these information can be obtained by the investigations of the heatlines and entropy generation. Therefore, the laminar free convection in an enclosure forming by a hot inner circular cylinder and cold sinusoidal outer cylinder at different amplitude (λ=1, 2, and 4) and Rayleigh Number range (103-106) is numerically studied. Heatlines, streamlines, isotherms, and entropy generation are obtained using finite element technique based on the Galerkin method. The inner and outer cylinders are assumed to be kept at a constant temperature. Air is the working fluid with Prandtl number (0.71). The results showed that the fluid circulations are governed by two combined facts; the first one is the buoyancy force that excited by the increasing of Rayleigh number producing bigger circulations and the second is the increasing in the nondimensional amplitudes which damps the flow.

4 citations


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01 Jan 2007

1,932 citations

01 Jan 2016
TL;DR: The numerical heat transfer and fluid flow is universally compatible with any devices to read and is available in the authors' digital library an online access to it is set as public so you can get it instantly.
Abstract: Thank you for reading numerical heat transfer and fluid flow. Maybe you have knowledge that, people have search numerous times for their favorite books like this numerical heat transfer and fluid flow, but end up in infectious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they cope with some malicious virus inside their computer. numerical heat transfer and fluid flow is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection spans in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the numerical heat transfer and fluid flow is universally compatible with any devices to read.

1,531 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of Reynolds number, length and height of the surface corrugation wave, nanoparticle volume fraction, amplitude and frequency of flow pulsation on the fluid flow and heat transfer were numerically examined by using finite volume method.

87 citations

Journal ArticleDOI
TL;DR: In this paper, a review and recent trends of laser-cladded high-entropy Alloy Coatings (LC-HEACs) is presented, aiming to address the use of LC technology for HEA materials, and the influence of process parameters on the geometric and metallurgical characteristics of the LC-heACs.

79 citations

Journal ArticleDOI
TL;DR: In this article, the influence of the Hartmann number, Ha, Rayleigh number, Ra, and nanoparticle concentration on the Nusselt number was investigated by employing Galerkin-weighted residual formulation, and the results revealed that increasing Ha has an insignificant effect on Nu, however, it significantly pulls Nu down up to 33% for higher Ra, because of restricting convection.

43 citations