The ERCOFTAC junction flow is numerically simulated with both a structured and an unstructured RANS solver for incompressible flows. The structured code adopts a finite volume, cell-centered formulation while the unstructured code uses residual distribution schemes and a vertex centered storage of the unknowns. Two differential eddy viscosity models, based on local quantities, are considered in the computations: the one-equation Spalart-Allmaras model and the two equations k -epsilon model proposed by Lam and Bremhorst. The grid dependence of the numerical solutions is evaluated by means of a convergence analysis based on computation of the GCI and a code-to-code comparison. The numerical results provided by both turbulence models are compared with the experimental measurements of the pressure and velocity fields.
RANS simulations of a junction flow / Paciorri, Renato; Aldo, Bonfiglioli; Andrea Di, Mascio; Favini, Bernardo. - In: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS. - ISSN 1061-8562. - STAMPA. - 19:2(2005), pp. 179-189. (Intervento presentato al convegno 11th Annual Conference of the CFD-Society-of-Canada tenutosi a Vancouver, CANADA nel MAY 28-30, 2003) [10.1080/10618560410001729126].
RANS simulations of a junction flow
PACIORRI, Renato;FAVINI, Bernardo
2005
Abstract
The ERCOFTAC junction flow is numerically simulated with both a structured and an unstructured RANS solver for incompressible flows. The structured code adopts a finite volume, cell-centered formulation while the unstructured code uses residual distribution schemes and a vertex centered storage of the unknowns. Two differential eddy viscosity models, based on local quantities, are considered in the computations: the one-equation Spalart-Allmaras model and the two equations k -epsilon model proposed by Lam and Bremhorst. The grid dependence of the numerical solutions is evaluated by means of a convergence analysis based on computation of the GCI and a code-to-code comparison. The numerical results provided by both turbulence models are compared with the experimental measurements of the pressure and velocity fields.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.