PPT-LES of Turbulent Flows: Lecture 2

ME EN 7960008 Prof Rob Stoll Department of Mechanical Engineering University of Utah Spring 2011 Vorticity or Turbulent Flow Properties Why study turbulence Most real flows in engineering applications are turbulent . Typically occurs when the velocity is low or the fluid is very viscous. 2 3Turbulent flow Opposite of laminar, where considerable mixing occurs, velocities are high. Laminar and Turbulent fl : Lecture 12. (ME EN 7960-008). Prof.. Rob Stoll. Department of Mechanical Engineering. University of Utah. Spring 2011. Turbulence modeling (alternative strategies). . Filtered Density Functions (FDF). Yang . Chen. 1. , . K.H. . Luo. 1,2. 1. . Center. . for Combustion Energy, Tsinghua University, Beijing, China. 2. Department . of Mechanical Engineering, University College London, UK. 8th Trondheim Conference on CO2 Capture, Transport and Storage. . and. idealized glass . Shin-. ichi. . Sasa. 　（. Kyoto University). . . . 　. 　　　　　　　　　　　　 　　. Lecture 8. Turbulent Premixed Flames Turbulent premixed Flames Experimental setup: Low swirl burner Filtered Rayleigh Scattering setup Turbulent premixed Flames Results -simultaneousPIV / PLIF The com Andy Pon, . Doug . Johnstone. ,. Michael J. Kaufman. ApJ. , submitted May 2011 . Ridge et al. (2006). Observed. (FWHM = 1.9 km / . s. ). Thermal broadening alone. (FWHM = 0.2 km / . s. ). 12. CO J = 1-0. : Lecture 7. (ME EN 7960-003). Prof.. Rob Stoll. Department of Mechanical Engineering. University of Utah. Fall 2014. Turbulence modeling (alternative strategies). So far our discussion of turbulence modeling has centered around separating the flow into resolved and . Lecture 1.7 Navier – Stokes Equations 1 • In general, the flows in turbomachinery can be classified as laminar, transitional and turbulent, depending on the relative magnitudes of inert EFD Final Project. Terrence Hess. Daniel Alexander. Mohammad Khan. Neil Lareau. 1. 21 Apr. 2011. Project Objectives . Characterize the diurnal evolution of turbulent statistics. for . two dissimilar 24 hour periods. 1. (ME EN 7960-. 003). Prof. Rob Stoll. Department of Mechanical Engineering. University of Utah. Fall 2014. Vorticity: or. Turbulent Flow Properties. Why study turbulence? Most real flows in engineering applications are turbulent. . (ME EN 7960-008). Prof. Rob Stoll. Department of Mechanical Engineering. University of Utah. Spring . 2011. Scale Separation. We discussed LES in a very generic way to this point:. Resolve only the largest energy containing scales. P. Balakumar . Flow Physics and Control . Branch. NASA Langley Research Center. Symposium on Advances in Turbulence Modeling. July 13, 2017. Ann Arbor. MI. Objectives. Perform DNS/LES to compute turbulent separated flows at high Reynolds numbers.. Lecture 9: Nonpremixed flames, edge flames. AME 514 - Spring 2017 - Lecture 9. Turbulent combustion (Lecture 3). Motivation (Lecture 1). Basics of turbulence (Lecture 1). Premixed-gas flames. Turbulent burning velocity (Lecture 1). (ME EN 7960-003). Prof.. Rob Stoll. Department of Mechanical Engineering. University of Utah. Fall 2014. The LES filter can be used to decompose the velocity field into resolved and subfilter scale (SFS) components.