Application of a new methodology for simulations of complex turbulent flows

H. L. Zhang, C. R. Bachman, Hermann F Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A new "Flow Simulation Methodology" (FSM) is presented, which is based on employing a new type of turbulent stress model for time dependent turbulent flow computations in the general form of Large Eddy Simulations (LES). Therefore, FSM is similar to LES in the sense that the large scales are computed and the small scales are modeled. The main difference, however, between our FSM and traditional LES is that the subgrid-scale stress model of LES is replaced by the product of a contribution function and a state-of-the-art Reynolds stress model. The contribution function is designed such that, when FSM is integrated into the Navier-Stokes code, simulations approach an unsteady RANS calculation when the grid resolution is decreased (or the Reynolds number is increased). Conversely, simulations approach a DNS when grid resolution is increased (or the Reynolds number is decreased). With the FSM, it should be possible to simulate complex turbulent boundary layer flows to a greater degree of accuracy than with traditional RANS or LES methods. The new model was implemented and tested for turbulent flat plate boundary layer flows, both with and without separation. The results have shown many distinct features, indicating that the new methodology is very promising.

Original languageEnglish (US)
Title of host publicationFluids 2000 Conference and Exhibit
StatePublished - 2000
EventFluids 2000 Conference and Exhibit - Denver, CO, United States
Duration: Jun 19 2000Jun 22 2000

Other

OtherFluids 2000 Conference and Exhibit
CountryUnited States
CityDenver, CO
Period6/19/006/22/00

Fingerprint

Flow simulation
Large eddy simulation
Turbulent flow
Boundary layer flow
Reynolds number

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Zhang, H. L., Bachman, C. R., & Fasel, H. F. (2000). Application of a new methodology for simulations of complex turbulent flows. In Fluids 2000 Conference and Exhibit

Application of a new methodology for simulations of complex turbulent flows. / Zhang, H. L.; Bachman, C. R.; Fasel, Hermann F.

Fluids 2000 Conference and Exhibit. 2000.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhang, HL, Bachman, CR & Fasel, HF 2000, Application of a new methodology for simulations of complex turbulent flows. in Fluids 2000 Conference and Exhibit. Fluids 2000 Conference and Exhibit, Denver, CO, United States, 6/19/00.
Zhang HL, Bachman CR, Fasel HF. Application of a new methodology for simulations of complex turbulent flows. In Fluids 2000 Conference and Exhibit. 2000
Zhang, H. L. ; Bachman, C. R. ; Fasel, Hermann F. / Application of a new methodology for simulations of complex turbulent flows. Fluids 2000 Conference and Exhibit. 2000.
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