THERMAL SCIENCE

International Scientific Journal

NUMERICAL SIMULATION OF DIFFERENT TURBULENCE MODELS AIMING AT PERDICTING THE FLOW AND TEMPERATURE SEPARATION IN A RANQUE-HILSCH VORTEX TUBE

ABSTRACT
A computational fluid dynamics (CFD) model is used to compare the effect of different Reynolds Averaged Navier-Stokes (RANS) based turbulence models in predicting the temperature separation and power separation in a Ranque-Hilsch vortex tube. Three first order turbulence models (standard k-ε, Renormalized group RNG and shear stress transport (SST) K-ω model) together with a second order numerical scheme are surveyed in the present work. The simulations are done in 2D steady, axisymetric with high swirl flow model. The performance curves (hot and cold outlet temperatures and power separation versus hot outlet mass fraction) obtained by using these turbulence models are compared with the experimental results in different cold mass fractions. The aim is to select an appropriate turbulence model for the simulation of the flow phenomena. Because of large discrepancy between 2D and experiment, validation in 3D model is also considered. The performance analysis shows that among all the turbulence models investigated in this study, temperature separation predicted by the Renormalized group RNG model is closer to the experimental results.
KEYWORDS
PAPER SUBMITTED: 2011-07-27
PAPER REVISED: 2012-02-13
PAPER ACCEPTED: 2012-10-24
DOI REFERENCE: https://doi.org/10.2298/TSCI110727201A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Issue 4, PAGES [1159 - 1171]
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