Validation of Turbulence Convection in a 3-D Enclosed Chamber by Use of k-ω Model and SIMPLEC

  • S. G. Musyoki
  • K. O. Awuor
  • J. K. Kimunguyi
Keywords: turbulence, natural convention, k-ω model, SIMPLEC


Turbulent flows are highly unsteady (random), chaotic and three dimensional in motion. Turbulent flows have high Reynolds number, non-zero vorticity. Turbulent flows are diffusive and dissipate energy naturally. The aim of this project is to numerically investigate natural turbulent convection in a three dimensional enclosed chamber using k-ω model and SIMPLEC method. The research is to investigate temperature and velocity distribution in an enclosure. The equations governing the flow are Momentum, Continuity and Energy equations. The equations are first time averaged. The averaging process introduced non-linear terms; Reynolds stress and heat flux which are modelled using k-ω model. The emerging equations after modelling are non-dimensionalized and then discretized by finite volume method and the results solved using SIMPLEC algorithm. The numerical method is validated using benchmark experimental data provided by Markatos and Pericleous (1984). In this numerical investigation, the imbalance of the residual, by SIMPLEC became negligible after 350 iterations where done in period of 5 hrs while the simulation yielded non-dimensional temperature of 0.46, while the mean temperature profiles show a uniform distribution in the enclosure core.