Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Langer, C. A."

Now showing items 1-14 of 14

    • Book Chapter  

      Application of a New Algebraic Structure-Based Model to Rotating Turbulent Flows 

      Langer, C. A.; Kassinos, Stavros C.; Haire, S. L. (Elsevier, 2005)
      This chapter discusses application of a new algebraic structure-based model to rotating turbulent flows. A primary goal of Reynolds averaged Navier-Stokes (RANS-based modeling is to determine the Reynolds stress tensor in ...
    • Article  

      ASBM-BSL: An easy access to the structure based model technology 

      Aupoix, B.; Kassinos, Stavros C.; Langer, C. A. (2011)
      The Algebraic Structure Based Model (ASBM) offers unique features to represent the Reynolds stress tensor from the underlying turbulent structures. It is usually coupled with a non standard length scale equation. A way of ...
    • Article  

      Complex effects in Large Eddy Simulations 

      Kassinos, Stavros C.; Langer, C. A.; Iaccarino, G.; Moin, P. (2007)
    • Article  

      Diagnostic properties of structure tensors in turbulent flows 

      Grigoriadis, D. G. E.; Langer, C. A.; Kassinos, Stavros C. (2010)
      The behavior of turbulence structure tensors based on Large-Eddy Simulations (LES) in a wide range of turbulent channel flows is presented. The structure tensors provide significant physical information on the character ...
    • Article  

      Linear analysis of generalized turbulent hyperbolic flow in a rotating frame 

      Langer, C. A.; Akylas, Evaggelos; Kassinos, Stavros C. (2007)
      We apply inviscid rapid distortion theory to the generalized case of turbulent hyperbolic flow in a rotating frame and investigate the dependence of the evolution of the turbulent kinetic energy on the frame rotation rate. ...
    • Article  

      On the linear stability of turbulent plane strain flow in a rotating frame 

      Akylas, Evaggelos; Langer, C. A.; Kassinos, Stavros C.; Demosthenous, E. (2007)
      We apply inviscid rapid distortion theory to the limiting hyperbolic case of turbulent plain strain flow in a rotating frame and investigate the dependence of the evolution of the turbulent kinetic energy on the frame ...
    • Article  

      Preface 

      Kassinos, Stavros C.; Langer, C. A.; Iaccarino, G.; Moin, P. (2007)
    • Article  

      Rapid shear of initially anisotropic turbulence in a rotating frame? 

      Akylas, Evaggelos; Kassinos, Stavros C.; Langer, C. A. (2007)
      In the present study, we investigate, using inviscid rapid distortion theory, the evolution of sheared turbulence in a rotating frame as a function of the rotation rate (including stable, transitional, and unstable regimes), ...
    • Article  

      Rapidly sheared homogeneous stratified turbulence in a rotating frame 

      Kassinos, Stavros C.; Akylas, Evaggelos; Langer, C. A. (2007)
      Rapid distortion theory is applied to stratified homogeneous turbulence that is sheared in a rotating frame. Insight into the stabilizing and destabilizing effects of the combined stratification and frame rotation is gained ...
    • Article  

      A simplified structure-based model using standard turbulence scale equations: computation of rotating wall-bounded flows 

      Kassinos, Stavros C.; Langer, C. A.; Kalitzin, G.; Iaccarino, G. (2006)
      Two linear eddy-viscosity models, the v2-f and k-ω models, have been combined with an algebraic structure-based algorithm for the evaluation of the Reynolds stresses. This closure was originally designed as an integral ...
    • Article  

      Structure and scales in turbulence modeling 

      Reynolds, W. C.; Langer, C. A.; Kassinos, Stavros C. (2002)
      The enstrophy of the large-scale energy-containing turbulence is proposed as the second turbulence scale for use, in conjunction with the turbulence energy, in two-scale one-point engineering turbulence models. Its transport ...
    • Article  

      Structure-based turbulence model: Application to a rotating pipe flow 

      Poroseva, S. V.; Kassinos, Stavros C.; Langer, C. A.; Reynolds, W. C. (2002)
      A new approach for modeling the one-point turbulence statistics, which takes into account the information on turbulence structure, has been suggested in Kassinos and Reynolds (Report TF-61, Thermosciences Division, Department ...
    • Article  

      Structure-based turbulence modeling for wall-bounded flows 

      Kassinos, Stavros C.; Langer, C. A.; Haire, S. L.; Reynolds, W. C. (2000)
      The performance of Reynolds stress transport (RST) models in non-equilibrium flows is limited by the lack of information about two dynamically important effects: The role of energy-containing turbulence structure ...
    • Conference Object  

      When structure makes a difference: Computation of rotating wall-bounded flows with an algebraic structure-based model 

      Kassinos, Stavros C.; Langer, C. A.; Kalitzin, G.; Iaccarino, G. (Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, CyprusAffiliation: Center for Turbulence Research, Stanford University, Stanford, CA 94305, United StatesCorrespondence Address: Kassinos, S.C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, Cyprusemail: kassinos@ucy.ac.cy, 2005)
      Two linear eddy-viscosity models, the ν 2-f and κ-ω models, have been combined with an algebraic structure-based algorithm for the evaluation of the Reynolds stresses. This closure was originally designed as an integral ...