That report has been issued in the frame of the second research programme of ENEA-MSE agreement and it is one of the deliverabies of the task G 'Theoretical and experimental studies on IRIS critical components (SG, EHRS)' of the work-programme 2 'Evolutionary INTD reactors' of the research theme on 'Nuovo Nucleare da Fissione'. This document deals with the results of time-dependent numerical simulation carried out for evaluating flow and heat transfer in toroidal pipes. The analysis has been performed for two different curvatures (0.1 and 0.3) and for a wide range of Reynolds number so that to obtain flow ranging from laminar to chaotic. The report gives particular emphasis to quasi-periodic and periodic flow regimes that can be obtained for intermediate values of Reynolds number, which are poorly or not at all documented in literature.
|Titolo:||Modelling flow and heat transfer in helically coiled pipes - Part 2: Direct numerical simulations for laminar, transitional and weacly turbulent flow in the case of zero pitch|
|Data di pubblicazione:||28-set-2010|
|Appare nelle tipologie:||5.2 Documento in Garanzia della Qualità|