Modelling Turbulence Using the Staggered Grid and Simplec Method
Loading...
Date
2020
Authors
Kimunguyi, J. K.
Gatheri, F. K.
Awuor, K. O.
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Innovative Science and Research Technology
Abstract
In a natural convection, local density
differences and a resulting pressure gradient accelerate
the fluid. In this paper a numerical study of a turbulent,
natural convection problem is performed with an
incompressible fluid in a rectangular enclosure. At the
heated wall, the temperature distribution is a function
of temperature gradients. The objective of this study is
to conduct a numerical investigation of turbulent
natural convection in a 3-D cavity using the staggered
grid and the SIMPLEC method. The statisticalaveraging process of the mass, momentum and energy
governing equations introduces unknown turbulent
correlations into the mean flow equations which
represent the turbulent transport of momentum, heat
and mass, namely Reynolds stress () and heat flux (),
which are modeled using k- SST model. The ReynoldsAveraged Navier-stokes (RANS), energy and k- SST
turbulent equations are first non-dimensionalized and
the resulting equations are discretized using a staggered
and solved using SIMPLEC. From the results, both the
experimental data and simulation using the staggered
grid and SIMPLEC return a non-dimensional
temperature of 0.5 at the core of the cavity and almost
zero towards the cold and the natural turbulence flow is
responsible for temperature distribution. Further,
convective mass exchange is dominant in the centre of
the enclosure. The investigated Rayleigh number of this
study lies at Ra = 1.58.
Description
A research article published in International Journal of Innovative Science and Research Technology
Keywords
Turbulence, Natural Convention, Staggared Grid, SIMPLEC Method.
Citation
KIMUNGUYI, J., GATHERI, F., & AWUOR, K. Modelling Turbulence Using the Staggered Grid and Simplec Method.