Journal ArticleDOI
Expanded analogy between Boltzmann kinetic theory of fluids and turbulence
TLDR
In this article, the effects of turbulent fluctuations have a striking resemblance to those of microscale (thermal) fluctuations in laminar flows, even to higher order in the Knudsen number.Abstract:
We demonstrate that the effects of turbulent fluctuations have a striking resemblance to those of microscale (thermal) fluctuations in laminar flows, even to higher order in the Knudsen number. This suggests that there may be a good basis for understanding turbulence in terms of Boltzmann kinetic theory. If so, turbulence may be better described in terms of ‘mixing times’ rather than the more classical ‘mixing lengths’. Comparisons are made to Reynolds-stress turbulence models.read more
Citations
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Proceedings ArticleDOI
Simulation of Turbulent Flow in a Cyclonic Separator with Lattice-Boltzmann Method
TL;DR: In this article, a Lattice Boltzmann Method (LBM) based very large eddy simulation (VLES) approach is presented and applied to simulate unsteady turbulent flow simulation inside a cyclone separator.
Proceedings ArticleDOI
Lattice-Boltzmann Very Large Eddy Simulations of Fluidic Thrust Vectoring in a Converging/Diverging Nozzle
Avinash Jammalamadaka,Gregory M. Laskowski,Yanbing Li,James E. Kopriva,Pradeep Gopalakrishnan,Raoyang Zhang,Chen Hudong +6 more
Journal ArticleDOI
Combined Analysis of Cooling Airflow and Aerodynamic Drag for a Class 8 Tractor Trailer Combination
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On the mechanisms of jet-installation noise reduction with flow-permeable trailing edges
TL;DR: In this article, the authors investigated the mechanisms by which flow-permeable materials provided noise reduction in an installed jet configuration, and the results showed that even with a low permeability structure, significant noise reduction can still be achieved.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Book
Turbulence modeling for CFD
TL;DR: In this paper, the authors proposed a compressible ecoulement for compressible ECCs, based on the disquette reference record created on 2005-11-18, modified on 2016-08-08.
Small amplitude processes in charged and neutral one-component systems
TL;DR: In this article, a kinetic theory approach to collision processes in ionized and neutral gases is presented, which is adequate for the unified treatment of the dynamic properties of gases over a continuous range of pressures from the Knudsen limit to the high pressure limit where the aerodynamic equations are valid.
Journal ArticleDOI
Development of turbulence models for shear flows by a double expansion technique
TL;DR: In this article, a two-equation model and Reynolds stress transport model are developed for turbulent shear flows and tested for homogeneous shear flow and flow over a backward facing step.
Journal ArticleDOI
The Mathematical Theory of Non-Uniform Gases
TL;DR: Chapman and Cowling as mentioned in this paper showed that the ultimate scope of the descendent of the kinetic theory of gases must be the whole field of the properties of matter in bulk, derived from the atomic constitution of matter and from properties of atoms and their interactions.