PPT-LES of Turbulent Flows

Lecture 7 ME EN 7960003 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 . 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 The purpose of this. 2 hour class is to give basic directions to undergraduate students to use . Phoenics. to simulate turbulent flows.. The lecture gives a brief introduction to turbulent flows features, to scales and to the law of the wall.. Andy Pon. Doug . Johnstone. Michael J. Kaufman. Paola . Caselli. F. rancesco . Fontani. Aina. Palau. Michael J. Butler. Izaskun. Jiménez-Serra. René Plume. Jonathan C. Tan. Felipe . Alves. Pau Frau. : Lecture 11. (ME EN 7960-003). Prof.. Rob Stoll. Department of Mechanical Engineering. University of Utah. Fall 2014. . Evolution of . τ. ij. : . Deardorff. (ASME J. Fluids Eng., 1973). -. Deardorff. : Lecture 5. (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. spectra. in non-. Abelian. . gauge. . theories. Sebastian Scheffler,. TU Darmstadt,. 30 . January. 2009,. ¢. (2009) Heidelberg. Journal . references. : . J. Berges, S. Scheffler, D. . Sexty. , PRD 77, 034504 (2008) , arXiv. 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. of a turbulent stably stratified air flow. above the wavy water surface.. . O. A. Druzhinin, Y. I. Troitskaya. . Institute of Applied Physics, RAS, Nizhny Novgorod, Russia. and. S.S. Zilitinkevich. LAMINAR FLOW . V.S. TURBULENT FLOW. This shows turbulence because it’s all over the place and rough. This part of the picture shows Laminar Flow because it runs very smoothly. 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.. 1. Sandia . National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of  Sandia, LLC, a wholly owned subsidiary of Honeywell International,  Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525.  SAND2017-6417C. DESCRIBE . the characteristics and flow velocity profiles of laminar flow and turbulent flow.. DEFINE . the property of viscosity.. DESCRIBE . how the viscosity of a fluid varies with temperature.. DESCRIBE . Gregory Falkovich. Weizmann Institute of Science. Rutgers, May 10, 2009. D. Bernard, A. Celani,. G. Boffetta, S. Musacchio. W. L. Physics Today . 59. (4), 43 (2006). Turbulence is a state of a physical system with many degrees of freedom deviated far from equilibrium. It is irregular both in time and in space.. (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.