Dr. Sarker is currently a Professor in the Department of Mathematics, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000.
Impact of a Closed Space Rectangular Heat Source on Natural Convective Flow through Triangular Cavity
In the existing numerical analysis is developed to impact of a closed space rectangular heat source on natural convective flow-through triangular cavity. The present problem is expressed as non-linear governing equations extended mathematical model is solved by engaging a Galerkin weighted residual process of a finite element scheme. Some investigation is acted for several Rayleigh number (Ra) at Pr = 0.71 on flow pattern and heat variation inside an enclosure. The resulting numerical clarifications of the query are exhibited graphically in phases of streamlines, velocity profiles, isotherms, Rectangular bar effectiveness, mean Nusselt number, and average fluid temperature. The acquired outcomes verified that a rate of heat variation progress with the rise of a Rayleigh number within a triangular cavity. Results are verified relating to a published work.
Heat Transport Exploration of Free Convection Flow inside Enclosure Having Vertical Wavy Walls
This paper expresses a numerical study of flow features and heat transport inside enclosure. Governing equations will be discretized by finite-element process with a collected variable arrangement. The assumptions of the Grashof number (10 3-10 6), aspect ratio (1.0-2.0), wave ratio (0.0-0.40) concerning a fluid with Pr = 0.71. Streamlines and isotherm lines are utilized to show the corresponding flow and thermal field inside a cavity. Global and local distributions Nusselt numbers are displayed for the before configuration. Finally, velocity and temperature profiles are displayed for some selected positions inside an enclosure for a better perception of the flow and thermal field.
Effect of Fin Length and Location on Natural Convection Heat Transfer in a Wavy Cavity
The present study aims to analyze the natural convection flow and heat transfer in a wavy cavity with a single horizontal fin attached to its hot wall. Galerkin weighted residual finite element technique has been employed to solve the governing nonlinear dimensionless equations. The effects of model parameters like Rayleigh number, fin length and location on the fluid flow and heat transfer are investigated. The obtained results are exhibited graphically in terms of flow structure, temperature dispersion, velocity field, fin effectiveness, local Nusselt number, and average Nusselt number. It is observed that the different fin length and location have a substantial effect on flow structure and temperature field. Fin effectiveness is also studied and the highest fin effectiveness was found at fin length (L = 0.75). Besides, it is also found that the mean Nusselt number increases significantly with the increase of Rayleigh number and fin length. Wavy cavity becomes more effective on heat transfer behaviors and fluid flow than that of a square cavity.
Numerical Investigation of Natural Convection Flow in a Hexagonal Enclosure Having Vertical Fin
Numerical study of natural convection flow in a hexagonal enclosure with a single vertical fin attached to its heated bottom wall has been carried out. Finite element method based Galerkin weighted residual technique is used to solve the governing equation. The horizontal walls of the enclosure are kept at constant high temperature while the inclined walls are kept at constant cold temperature. A vertical heated fin is attached to the hot bottom wall with a length at a position from the left surface having thickness . The Prandlt number for the flow inside the enclosure is 0.71. The results of the problem are presented in graphical and tabular forms and discussed. The fin efficiency and temperature distribution were examined. The numerical results indicate the strong influence of the mentioned parameters on the flow structure and heat transfer as well as temperature. A set of graphical results are presented in terms of streamlines, isotherms contour, temperature profiles, velocity profiles, local Nusselt number and average Nusselt number. The obtained results indicated that the heat transfer rate increases with the increase of Rayleigh number in a hexagonal enclosure. The results are validated comparing with the published works.
Numerical Investigation of MHD Mixed Convection Heat Transfer Having Vertical Fin in a Lid-Driven Square Cavity
Numerical study of MHD mixed convection heat transfer in a lid-driven square cavity with single vertical fin attached to it’s hot wall has been carried out. Finite element method based Galerkin weighted residual technique is used to solve the governing equation. The effect of Richardson number, Hartmann number on the fluid flow and heat transfer characteristic inside the enclosure is investigated. A set of graphical results are presented in terms of streamlines, isotherms, temperature profiles, velocity profiles and fin effectiveness. The results indicate that the heat transfer rate increases with the increase of Richardson number and that, Hartmann number is a good control parameter for heat transfer in the flow having vertical fin in a lid-driven square cavity. The results are validated comparing with the published works.