NAFEMS International Journal of CFD Case Studies

Volume 9, January 2011

ISSN 1462-236X

Prediction of Turbulent Heat Transfer for Industrial Drying Processes – Turbulence Model Assessment

Q Ye, K Pulli and A Scheibe
Fraunhofer Institute for Manufacturing Engineering and Automation, Nobelstr. 12, 70569 Stuttgart, Germany

https://doi.org/10.59972/n2vy3bq0

Keywords: Heat Transfer, Turbulence Model and Simulation of Drying Processes

Abstract

This paper presents numerical investigations of turbulent heat transfer for industrial drying processes. The CFD code FLUENT was applied. The performance of various turbulence models, especially the grid sensitivity to the prediction of the Nusselt number, was tested using available experimental data of single jet impingement and the DNS data of channel flow. The sst-kˆ turbulence model with enhanced wall function that was found to give a reasonably accurate prediction of heat transfer with lower grid sensitivity was applied to the flow calculation in dryers. Flat sheets as well as more complicated geometries of substrates, for instance, a truck chassis were used in the simulations. The calculated heating-up behaviour on the substrates was compared with experimental results.

References

[1] BREDBERG, J., and DAVIDSON, L.: Low-Reynolds number turbulence models: An approach for reducing meshes sensitivity. Transactions of the ASME 126, PP.14-21, 2004.

[2] POPOVAC, M., and HANJALIå, K.: Compound wall treatment for RANS computation of complex turbulent flows and heat transfer, Applied Scientific Research, 78(2), pp.177-202, 2007.

[3] VIESER, W., ESCH, T. and MENTER, F.R.: Heat transfer predictions using advanced two-equation turbulence models. CFX Validation Report: CFX-VAL10/1002.

[4] FLUENT User’s Guide.

[5] MENTER F.R.: Two-equation eddy-viscosity turbulence models for engineering applications. AIAA-Journal, 32(8) pp. 269-289, 1994.

[6] BEHNIA, M., PARNIEX, S., DURBIN, P. A.: Prediction of heat transfer in an axisymmetric turbulent jet impinging on a flat plate. Int. J. Heat Mass Transfer 41, pp.1845-1855, 1998.

[7] KAWAMURA, H., ABE, H., and MATSUO, Y.: DNS of turbulent heat transfer in channel flow with respect to Reynolds and Prandtl number effects. Int. J. of Heat and Fluid Flow 20, pp.196-270, 1999.

[8] Ye, Q., PULLI, K., SCHEIBE, A., J DOMNICK, and GRUSECK, D.: Numerical and experimental study of convective heat transfer with complicated turbulent flow in a laboratory dryer for turbulence model assessment. 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. July 2008, Pretoria, South Africa.

[9] MENTER, F.R.: Heat transfer predictions using advanced two-equation turbulence models. CFX Validation report, CFX-VAL10/1002(2007)

[10] BAUGHN, J., HECHANOVA, A., YAN, X.: An experimental study of entrainment effects on the heat transfer from a flat surface to a heated circular impinging jet. Heat Transfer 1991; 111:1023-5.

[11] BAUGHN, J., SHIMIZU, S.: Heat transfer measurements from a surface with uniform heat flux and an impinging jet. Heat Transfer 1989; 111:1096-8

[12] YAN, X., BAUGHN, J., MESBAH, M.: The effects of Reynolds number on the heat transfer distribution from a flat plate to an impinging jet. ASME HTD 1992; 226:1-7.

Cite this paper

Q Ye, K Pulli, A Scheibe, Prediction of Turbulent Heat Transfer for Industrial Drying Processes – Turbulence Model Assessment, NAFEMS International Journal of CFD Case Studies, Volume 9, 2011, Pages 51-60, https://doi.org/10.59972/n2vy3bq0