Journal of the Association of Engineers, India

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Turbulent Fluid Flow and Heat Transfer through a Horizontal Rectangular Diffuser with the Use of Single and Double Baffles


Affiliations
1 Department of Computer Science and Engineering, Jadavpur University, Kolkata-700 032, India
2 Department of Mechanical Engineering, Heritage Institute of Technology, Kolkata-700107, India
3 Deputy Director of Industrial Training, West Bengal, In-Charge of Govt. ITI Howrah Homes Technical Education, Training and Skill Development Department, Govt. of West Bengal, India
4 Department of Mechanical Engineering, Jadavpur University, Kolkata-700032, India
     

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Scientists and engineers give much attention for convective fluid flow around the baffles because of its wide application in different types of heat exchangers used in industries. Analysis of the velocity profiles of the turbulent flow and convection flow parameters have been studied for a horizontal rectangular asymmetric diffuser, the bottom wall of which is being heated. Single and double baffles of equal height are used in the experiments. The experimental study has been carried out at Reynolds numbers of 3.594x104 3.986x104 and 5.371x104 with base plate temperatures of 323K and 343K respectively. Skin friction coefficient along the walls has been calculated. The variation of local Nusselt number along the upper wall is observed carefully. The effort is made to establish some new empirical relationships between Coefficient of skin friction and Nusselt number with Reynolds number The size of recirculation bubble is also calculated.

Keywords

Turbulence, Baffles, Rectangular Diffuser, Skin Friction Coefficient, Reynolds Number.
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  • Turbulent Fluid Flow and Heat Transfer through a Horizontal Rectangular Diffuser with the Use of Single and Double Baffles

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Authors

S. Bhattacharjee
Department of Computer Science and Engineering, Jadavpur University, Kolkata-700 032, India
A. Mandal
Department of Mechanical Engineering, Heritage Institute of Technology, Kolkata-700107, India
R. Debnath
Deputy Director of Industrial Training, West Bengal, In-Charge of Govt. ITI Howrah Homes Technical Education, Training and Skill Development Department, Govt. of West Bengal, India
S. Majumder
Department of Mechanical Engineering, Jadavpur University, Kolkata-700032, India

Abstract


Scientists and engineers give much attention for convective fluid flow around the baffles because of its wide application in different types of heat exchangers used in industries. Analysis of the velocity profiles of the turbulent flow and convection flow parameters have been studied for a horizontal rectangular asymmetric diffuser, the bottom wall of which is being heated. Single and double baffles of equal height are used in the experiments. The experimental study has been carried out at Reynolds numbers of 3.594x104 3.986x104 and 5.371x104 with base plate temperatures of 323K and 343K respectively. Skin friction coefficient along the walls has been calculated. The variation of local Nusselt number along the upper wall is observed carefully. The effort is made to establish some new empirical relationships between Coefficient of skin friction and Nusselt number with Reynolds number The size of recirculation bubble is also calculated.

Keywords


Turbulence, Baffles, Rectangular Diffuser, Skin Friction Coefficient, Reynolds Number.

References





DOI: https://doi.org/10.22485/jaei%2F2021%2Fv91%2Fi1-4%2F222451