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RISA Proposed Universal Wall Function for Velocity and Temperature in Turbulent Near-Wall Flows of Low and High Prandtl Number Fluids
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Wall functions are often used in practical engineering analysis of turbulent boundary layers to approximate the near-wall mean velocity and temperature distributions and/or provide boundary conditions, by relating flow ...
A Diagnostic Numerical Study of the Semiannual Variation of the Zonal Wind in the Tropical Stratosphere and Mesosphere
Publisher: American Meteorological Society
Abstract: Semiannual variations in the temperature and zonal wind have been found to be the dominant oscillations of the circulation in the tropical upper stratosphere and mesophere. Many hypotheses have been presented in an attempt ...
A Recommended Correction to the kT−kL−ω Transition-Sensitive Eddy-Viscosity Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A physics-based modification to the kT−kL−ω transition-sensitive eddy-viscosity model is presented. The modification corrects an anomaly related to the physical mechanism of production of laminar kinetic energy for regions ...
Lumped‐Parameter Approach to Stability Analysis
Publisher: American Society of Civil Engineers
Abstract: A structural stability modeling technique based on representing the in‐plane forces as discretized or lumped parameters is developed and applied to various structural members. Elastic critical loads on structures such as ...
Hybrid RANS–LES Simulation of Turbulent Heat Transfer in a Channel Flow With Imposed Streamwise or Spanwise Mean Temperature Gradient
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Computational fluid dynamics (CFD) results are presented for turbulent flow and heat transfer in a plane channel. This study investigates an idealized fully developed planar channel flow case for which the mean velocity ...
Evaluation of a Statistically Targeted Forcing Method for Synthetic Turbulence Generation in Scale-Resolving Simulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Computational fluid dynamics (CFD) results are presented for synthetic turbulence generation by a proposed statistically targeted forcing (STF) method. The new method seeks to introduce a fluctuating velocity field with a ...
Scale-Resolving Simulations of a Statistically Targeted Forcing Method for Synthetic Turbulence Generation in a Freestream Turbulence
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Computational fluid dynamics results for synthetic turbulence generation of freestream turbulence by a proposed statistically targeted forcing (STF) method are presented. The STF method has been previously documented for ...
Static and Dynamic Time Filtering Techniques for Hybrid RANS-Large Eddy Simulation of Non-Stationary Turbulent Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Unsteady turbulent wall bounded flows can include complex flow physics such as temporally varying mean pressure gradients, intermittent regions of high turbulence intensity, and interaction of different scales of motion. ...
Sensitization of a Transition Sensitive Linear Eddy Viscosity Model to Rotation and Curvature Effects
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new scalar eddyviscosity turbulence model is proposed, designed to exhibit physically correct responses to flow transition, streamline curvature, and system rotation effects. The eddyviscosity model (EVM) developed herein ...
Generalized Dunkerley Bounds for Discrete Systems
Publisher: American Society of Civil Engineers
Abstract: An efficient algorithm for evaluating bounds on the smallest and the largest natural frequencies of discrete linear systems is presented. The algorithm is based on generalized Dunkerley formulas, Danilevsky's method and ...