PPT-LES of Turbulent Flows : Lecture 5

ME EN 7960003 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. Divesting in turbulent times Achieving value in a buyer’s marketContentsForewordSurvey highlightsStrategyPreparationExecutionUnprecedented times for business10 Golden rulesHow Ernst & Young can : . Lecture 8. (ME EN 7960-003). Prof.. Rob Stoll. Department of Mechanical Engineering. University of Utah. Fall 2014. LES and numerical methods. LES requires that the filtered equations of motion (see Lectures 5 and 6) be solved on a numerical grid.. : 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). Alan Marscher. Institute for Astrophysical Research, Boston University. Research Web Page: . www.bu.edu/blazars. . Polarization varies erratically, as expected if it results from turbulence (or some disordering similar to turbulence). . and. idealized glass . Shin-. ichi. . Sasa. 　（. Kyoto University). . . . 　. 　　　　　　　　　　　　 　　. Navier. -Stokes. Equations -- . RANS. 4 equations; 7 unknowns. Similar situation as when we went from Cauchy’s . eq. to N-S . eq. A. j. . = eddy viscosity. [m. 2. /s]. Turbulence Closure. Turbulent Kinetic Energy (TKE). : 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 . 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. 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. 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. . Navier. -Stokes. Equations -- . RANS. 4 equations; 7 unknowns. Similar situation as when we went from Cauchy’s . eq. to N-S . eq. A. j. . = eddy viscosity. [m. 2. /s]. Turbulence Closure. Turbulent Kinetic Energy (TKE). 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..