Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi !

Harmonic Balance developments in OpenFOAM (CROSBI ID 257677)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Cvijetić, Gregor ; Gatin, Inno ; Vukčević, Vuko ; Jasak, Hrvoje Harmonic Balance developments in OpenFOAM // Computers & fluids, 172 (2018), 632-643. doi: 10.1016/j.compfluid.2018.02.023

Podaci o odgovornosti

Cvijetić, Gregor ; Gatin, Inno ; Vukčević, Vuko ; Jasak, Hrvoje

engleski

Harmonic Balance developments in OpenFOAM

The Harmonic Balance method for simulating unsteady nonlinear periodic flows is presented in this pa- per. Its recent, yet rapid development was motivated by the possibility of significant CPU time consump- tion savings compared to conventional transient methods, while providing sufficient accuracy. Using the Harmonic Balance method, a single time-continuous primary variable is decomposed into a number of steady state snapshots throughout the representative period, depending on the number of resolved harmonics. Decomposition is done following the Fourier series, yielding the mutually coupled equations where time derivation term is replaced by a coupling source term. Therefore, the decomposi- tion relates to temporal evolution and accounts for transient effects. The numerical method is based on the Finite Volume (FV) method for computational fluid dynam- ics and was implemented in the open-source software foam-extend . Along with the mathematical model, this work presents the additional derivation of temporal coupling over the interface for cases with more than one domain. With proper mathematical procedure, no additional time-interpolation between interfaces is needed, presenting a novelty in the field. The method is validated in two distinct fields: turbomachinery and naval hydrodynamics. Turboma- chinery test cases consist of 2D ERCOFTAC centrifugal pump and a 3D Aachen turbine, for which the comparison with conventional transient and steady state results is performed. For the ERCOFTAC case, CPU time comparison is presented as well. Two phase variant of the Harmonic Balance method is vali- dated on regular wave propagation test case, including the comparison with transient results, which is followed by a DTMB ship hull on waves test case. The two-phase variant of Harmonic Balance represents a novelty in the field of method application. The overall results show the approach is both efficient and accurate, while offering versatility in the area of application.

Foam-extend ; Harmonic Balance ; Turbomachinery ; Fourier series ; Periodic flow

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

172

2018.

632-643

objavljeno

0045-7930

1879-0747

10.1016/j.compfluid.2018.02.023

Povezanost rada

Strojarstvo

Poveznice
Indeksiranost