We report on LES, URANS and hybrid LES/RANS simulations of transitional and turbulent flow and heat transfer around a short cylinder (h=0.4d) bounded by parallel end-walls. While U-RANS, and hybrid LES/RANS captured just the basic modes - the main horseshoe and the dominant shed vortices - , LES reproduced the time- and phase-averaged streamline patterns, Strouhal number and other flow features in agreement with the PIV measurements of Ref.[1]. The successive discussion will focus on the main features of the vortex topology educed from the LES results, and identify the dominant structures and their effects on heat transfer.
LES and hybrid LES/RANS study of flow and heat transfer in plate fin and tube heat exchanger / Borello, Domenico; Delibra, Giovanni; K., Hanjalic; Rispoli, Franco. - STAMPA. - 131(2010), pp. 147-150. [10.1007/978-3-642-02225-8_35].
LES and hybrid LES/RANS study of flow and heat transfer in plate fin and tube heat exchanger
BORELLO, Domenico;DELIBRA, GIOVANNI;RISPOLI, Franco
2010
Abstract
We report on LES, URANS and hybrid LES/RANS simulations of transitional and turbulent flow and heat transfer around a short cylinder (h=0.4d) bounded by parallel end-walls. While U-RANS, and hybrid LES/RANS captured just the basic modes - the main horseshoe and the dominant shed vortices - , LES reproduced the time- and phase-averaged streamline patterns, Strouhal number and other flow features in agreement with the PIV measurements of Ref.[1]. The successive discussion will focus on the main features of the vortex topology educed from the LES results, and identify the dominant structures and their effects on heat transfer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
