Turbulent Natural Convection in a Three Dimensional Enclosure With Triangular Roof

Banik, Ashish (2017) Turbulent Natural Convection in a Three Dimensional Enclosure With Triangular Roof. MTech thesis.

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Abstract

The turbulent natural convection in a three dimensional cuboidal enclosure with triangular roof is studied by employing the standard k − model having standard wall functions. The flow and thermal characteristics are presented in the form of streamline, isotherm contours, velocity contour, velocity vector, turbulent kinetic energy and dissipation of turbulent energy. A comparative study has been made between the cuboidal enclosure, cuboidal enclosure having adiabatic tilted roof and cuboidal enclosure having hot tilted roof.. The finite volume method based SIMPLE algorithm is utilized for understanding the flow and thermal behavior arising due to buoyancy. The governing equation of momentum, energy, k- equation and ε- equation are discretised using the second order upwind scheme. Local values of Nusselt number are also presented for side walls for Rayleigh numbers ranging between 1010 and 1011. Significant result are obtained by changing the dimensions of enclosures and by changing the boundary conditions given to the enclosure. The objective of this work is provide the required thermal comfort inside the enclosure by changing the boundary conditions. The effect of changing the geometry of enclosure for 3D flow and heat transfer rate have been studied. Three dimensional cuboidal enclosure having hot tilted roof provides the satisfactorily result as compare to the other two types of enclosure.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Turbulent Natural Convection; Three dimensional cuboidal enclosure; Triangular Roof; Numerical Modelling
Subjects:Engineering and Technology > Mechanical Engineering > Computational Fluid Dynamics
Divisions: Engineering and Technology > Department of Mechanical Engineering
ID Code:9067
Deposited By:Mr. Kshirod Das
Deposited On:02 May 2018 16:01
Last Modified:02 May 2018 16:01
Supervisor(s):Satapathy, Ashok Kumar

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