Wavy surfaces are encountered in a large variety of applications, and are well-known for enhancing heat and mass transfer mechanisms. The present study numerically investigates the flow dynamics and heat transfer for turbulent flow in a channel with one flat and one wavy wall. Investigations have been conducted for a Prandtl number Pr = 0.71 and Reynolds numbers Re = 13840 and Re = 19 000, based on the bulk velocity and the hydraulic diameter. Direct Numerical Simulations (DNSs) have been performed for a deep understanding of the dynamic effects on the heat transfer mechanisms for the case of turbulent flow in the channel with one wavy wall. The performance of two different Reynolds-Averaged Navier Stokes (RANS) turbulence models, namely the k-omega SST and the q-zeta, selected for their favorable characteristics, is assessed against the DNSs results. The applicability of the two selected RANS model is ascertained from a qualitative point of view.

Numerical simulations of turbulent heat transfer in a channel with one wavy wall / Errico, Orsola; Cavazzuti, Marco; Angeli, Diego; Stalio, Enrico. - STAMPA. - (2012), pp. 1251-1261. (Intervento presentato al convegno Seventh International Symposium on Turbulence, Heat and Mass Transfer tenutosi a Palermo, Italy nel 24-27 September, 2012) [10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1290].

Numerical simulations of turbulent heat transfer in a channel with one wavy wall

ERRICO, Orsola;CAVAZZUTI, Marco;ANGELI, Diego;STALIO, Enrico
2012

Abstract

Wavy surfaces are encountered in a large variety of applications, and are well-known for enhancing heat and mass transfer mechanisms. The present study numerically investigates the flow dynamics and heat transfer for turbulent flow in a channel with one flat and one wavy wall. Investigations have been conducted for a Prandtl number Pr = 0.71 and Reynolds numbers Re = 13840 and Re = 19 000, based on the bulk velocity and the hydraulic diameter. Direct Numerical Simulations (DNSs) have been performed for a deep understanding of the dynamic effects on the heat transfer mechanisms for the case of turbulent flow in the channel with one wavy wall. The performance of two different Reynolds-Averaged Navier Stokes (RANS) turbulence models, namely the k-omega SST and the q-zeta, selected for their favorable characteristics, is assessed against the DNSs results. The applicability of the two selected RANS model is ascertained from a qualitative point of view.
2012
Seventh International Symposium on Turbulence, Heat and Mass Transfer
Palermo, Italy
24-27 September, 2012
1251
1261
Errico, Orsola; Cavazzuti, Marco; Angeli, Diego; Stalio, Enrico
Numerical simulations of turbulent heat transfer in a channel with one wavy wall / Errico, Orsola; Cavazzuti, Marco; Angeli, Diego; Stalio, Enrico. - STAMPA. - (2012), pp. 1251-1261. (Intervento presentato al convegno Seventh International Symposium on Turbulence, Heat and Mass Transfer tenutosi a Palermo, Italy nel 24-27 September, 2012) [10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1290].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/840889
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