Author: Carl Alden ScraggPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 92
Book Description
Diffusion of Heat from a Line Source in Low-speed Turbulence
Author: Carl Alden ScraggPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 92
Book Description
Diffusion of Heat from a Line Source in Isotropic Turbulence
Author: Mahinder S. UberoiPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 98
Book Description
An experimental and analytical study has been made of some features of the turbulent heat diffusion behind a line heated wire stretched perpendicular to a flowing isotropic turbulence. The mean temperature distributions have been measured with systematic variations in wind speed, size of turbulence producing grid, and downstream location of heat source. The nature of the temperature fluctuation field has been studied. A comparison of Lagrangian and Eulerian analyses for diffusion in a nondecaying turbulence yields an expression for turbulent-heat-transfer coefficient in terms of turbulence velocity and a Lagrangian "scale." A convenient form has been deduced for the criterion of interchangeability of instantaneous space and time derivations in a flowing turbulence.
Diffusion of Heat from a Line Source in Isotropic Turbulence
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
An experimental and analytical study has been made of some features of the turbulent heat diffusion behind a line heated wire stretched perpendicular to a flowing isotropic turbulence. The mean temperature distributions have been measured with systematic variations in wind speed, size of turbulence-producing grid, and downstream location of heat source. The nature of the temperature fluctuation field has been studied. A comparison of Lagrangian and Eulerian analyses for diffusion in a nondecaying turbulence yields an expression for turbulent-heat-transfer coefficient in terms of turbulence velocity and a Lagrangian "scale". The ratio of Eulerian to Lagrangian microscale has been determined theoretic ally by generalization of a result of Heisenberg and, with arbitrary constants taken from independent sources, shows rough agreement with experimental results. A convenient form has been deduced for the criterion of interchangeability of instantaneous space and time derivatives in a flowing turbulence.
Diffusion from a Periodically Heated Line-Source Segment and Its Application to Measurements in Turbulent Flows
Author: Roald A. WigelandPublisher:
ISBN:
Category :
Languages : en
Pages : 109
Book Description
A heat tracer technique for determination of mean streak lines and average convection velocities over long distances in turbulent flow fields is developed. The system is made up of a periodically heated line-source segment, a temperature sensing cold-wire probe, and associated signal processing equipment. Cross-correlations between the heating signal and the cold-wire output enhance resolution and permit mean velocity measurements. To evaluate the size of the thermal wake at different downstream locations and to determine the decay rate of the wake centerline temperature, a study of the diffusion of heat from the line-source segment was performed in three test flow conditions with different free-stream turbulence intensities.
Experiments on the Structure of Turbulence and the Diffusion of Heat from a Line Source in Uniformly Sheared Flows
Author: Umesh KarnikA Review of High-speed, Convective, Heat-transfer Computation Methods
Author: Michael E. TauberPublisher:
ISBN:
Category : Aerodynamic heating
Languages : en
Pages : 44
Book Description
Experiments on the Structure of Turbulence and the Diffusion of Heat from a Line Source in Uniformly Sheared Flows
Author: Umesh KarnikTurbulent Fluid Motion
Author: R. DeisslerPublisher: CRC Press
ISBN: 1000107345
Category : Technology & Engineering
Languages : en
Pages : 422
Book Description
This comprehensive book is based on the Navier-Stokes and other continuum equations for fluids. It interprets the analytical and numerical solutions of the equations of fluid motion. Topics included are turbulence, and how, why, and where it occurs; mathematical apparatus used for the representation and study of turbulence; continuum equations used for the analysis of turbulence; ensemble, time, and space averages as they are applied to turbulent quantities; the closure problem of the averaged equations and possible closure schemes; Fourier analysis and the spectral form of the continuum equations, both averaged and unaveraged; nonlinear dynamics and chaos theory.
Author: 
Author: