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Thakur, Harishchandra
- Comparison of Natural Convection Heat Transfer from a Vertical Cylinder Fitted with Annular Step Fins and Annular Triangular Fins
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PDF Views:90
Authors
Affiliations
1 Dept. of Mech. Engg., Gautam Buddha University, Greater Noida, IN
1 Dept. of Mech. Engg., Gautam Buddha University, Greater Noida, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 5 (2018), Pagination: 363-366Abstract
Natural convection heat transfer from a vertical cylinder with annular step and triangular fins has been studied numerically at various Rayleigh numbers within the laminar range. The computations were carried at constant fin spacing to tube diameter ratio of 1. In the current study, numerical simulations of Navier-Stokes equation supported with the energy equation are conducted for a vertical cylinder with annular step fins as well as triangular annular fins using the algebraic multi-grid solver of Fluent 15. With an increase in Rayleigh number, we’ve discovered a trend that the surface Nusselt number goes on increasing with comparison from a simple rectangular fin. Apart from this, the material needed for the step and triangular fins has been reduced with enhancements in the heat transfers.Keywords
Annular Step Fin, Annular Triangular Fin, Nusselt Number, Rayleigh Number, Heat Transfer, Natural Convection.Full Text
References
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- Numerical Analysis of a Semi-Infinite Solid with Temperature Dependent Thermal Conductivity using Truly Meshfree Method
Abstract Views :196 |
PDF Views:145
Authors
Affiliations
1 School of Engg., Gautam Buddha University, Greater Noida, Uttar Pradesh, IN
2 Rajasthan Technical University, Kota, Rajasthan, IN
1 School of Engg., Gautam Buddha University, Greater Noida, Uttar Pradesh, IN
2 Rajasthan Technical University, Kota, Rajasthan, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 4 (2018), Pagination: 307-312Abstract
This article presents Meshless Local Petrov-Galerkin (MLPG) method to obtain the numerical solution of linear and non-linear heat conduction in a semi-infinite solid object with specific heat flux. Moving least square approximants are used to approximate the unknown function of temperature T(x) with Th(x). These approximants are constructed by using a linear basis, a weight function and a set of non-constant coefficients. Essential boundary condition is imposed by the penalty function method. A predictor-corrector scheme based on direct substitution iteration has been applied to address the non-linearity and two-level method for temporal discretization. The accuracy of MLPG method is verified by comparing the results for the simplified versions of the present model with the exact solutions. Once the accuracy of MLPG method is established, the method is further extended to investigate the effects of temperature-dependent properties.Keywords
Transient, Temperature Dependent, Semi-Infinite Solid, Penalty Method, Heat Flux, Meshless Local Petrov-Galerkin.Full Text
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