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Thursday, May 14, 2020 | History

2 edition of Jet plume development in a thermally stratified medium found in the catalog.

Jet plume development in a thermally stratified medium

by R. Douglas Brown

  • 304 Want to read
  • 29 Currently reading

Published .
Written in English

    Subjects:
  • Aeronautics

  • The Physical Object
    Paginationp. ;
    ID Numbers
    Open LibraryOL25391012M

      The effect of thermal room stratification on the human plume is examined by comparing the stratified results with those of an additional CFD plume simulation in a uniform-temperature room. The resulting centerline velocity distribution and plume flow rates are by: Get this from a library! Turbulent jets and plumes: a Lagrangian approach. [J H W Lee; Vincent H Chu] -- CD-ROM contains: an interactive PC-based virtual-reality modelling software (VISJET .

      Data for pure jets and plumes in unstratified environments indicate that to first order the physics is captured by the Priestley and Ball entrainment model, implying that (1) the profile coefficient associated with the production of turbulence kinetic energy has approximately the same value for pure plumes and jets, (2) the value of ${\it\alpha Cited by: Comparison of Jet Plume Shape Predictions and. Plume Influence on. Sonic BoOm_Signature z = i Raymond L, Barger and N. Duane Metson HL/OZ N_Z-Z_ Uncles Z1 I" _I (NASA-TPZ) C_MPARISON OF JET PLUME 3HAPE PREDICTIONS AND PLUME INFLUENCE ON SONIC BOOM SIGNATURE (NASA) 23 p CSCI. O1A Ii ItFile Size: KB.

    1. Fluid instabilities. Study of various fluid driven instabilities in homogeneous and stratified flows (Experimental and computational). 2. Buoyant jet and plume dynamics. To understand plume behavior in stratified environments. This has high relevance to ocean and atmospheric mixing (Experimental work). 3. Multiphase flows over bodies. In hydrodynamics, a plume or a column is a vertical body of one fluid moving through another. Several effects control the motion of the fluid, including momentum (inertia), diffusion and buoyancy (density differences). Pure jets and pure plumes define flows that are driven entirely by momentum and buoyancy effects, respectively. Flows between these two limits are usually described as forced.


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Jet plume development in a thermally stratified medium by R. Douglas Brown Download PDF EPUB FB2

The behavior of an incompressible jet injected into a stably stratified stagnant reservoir was studied in an attempt to define some new aspects of the thermal pollution problem. Jet plume development in a thermally stratified medium. distribution behavior of an incompressible jet injected into a stably stratified stagnant reservoir was studied in an attempt to define some new aspects of the thermal pollution problem.

This experiment investigated the effects of injection angle, Reynolds Number Author: R. Douglas Brown. The flows, whose motion is in transition from a jet to a plume, are called a forced plume or a buoyant jet. Almost all jets whose fluid density differs from the ambient fluid density become plumes.

This chapter discusses the mechanics of jets and plumes whose. Buoyant Jets and Plumes: Theory and Models Environmental Hydraulics Definitions Plume = boundary layer flow originating from a source of buoyancy Buoyant jet (forced plume) = boundary layer flow originating from a source of momentum and buoyancyFile Size: KB.

Here, the entrainment dynamics of vertical turbulent buoyant jet/plume into a linearly stratified medium for varying Brunt Vaisala frequency (N) is presented by analyzing the development of large-scale and small-scale flow patterns.

The experimental facility for Author: N. Mirajkar Harish, Alan John Maniamkot, Sridhar Balasubramanian. Turbulent Jets and Plumes introduces the fundamental concepts and develops a Lagrangian approach to model these shear flows.

This theme persists throughout the text, starting from simple cases and building towards the practically important case of a turbulent buoyant jet in a density-stratified crossflow.

across the jet exhibits a nearly Gaussian shape (bell curve). Therefore, we can write: u(x,r) = umax exp − r2 2σ2 () wherex is the downstreamdistancealongthe jet (counted from the virtual source), r is the cross-jet radial distance from its centerline, umax(x) is the maximum speed atFile Size: KB.

Jets and plumes are shear flows produced by momentum and buoyancy forces. Examples include smokestack emissions, fires and volcano eruptions, deep sea vents, thermals, sewage discharges, thermal effluents from power stations, and ocean dumping of sludge. Knowledge of. A Theoretical Analysis of the Thermally Stratified Layer in the Lake Takuma Kawahara 93 On the Nonlinear Temperature Wave Propagation into the Depth of Ocean Branislav S.

Baclic The Development and Erosion of the Thermocline D. Spalding and U. Svensson Development of the Turbulent Mixed Region in a Stratified Medium 0. Buoyant jet and two-phase jet-plume modeling for application to large water pools Article in Nuclear Engineering and Design (5) May with 30 Reads How we measure 'reads'.

The jet exhibits a rapid acceleration on release, then deceleration, as it en We consider the flow structure and stability of a planar saline jet descending into a stable, density-stratified fluid. The jet exhibits a rapid acceleration on release, then deceleration, as it en We consider the flow structure and stability of a planar saline jet descending into a stable, density-stratified by: 2.

The development of a computer model for a two-dimensional round or slot jet plume is presented. The plume can be positively, negatively, or neutrally buoyant with respect to the ambient, and. Plumes and Thermals SUMMARY: This chapter describes several distinct structures that fluids develop in reaction to localized inputs of buoyancy.

A punctual and sustained source of buoyancy usually creates a continuous rise of lighter fluid through the ambient denser fluid, with mixing occurring along the way. Such structure is called a Size: 1MB.

Prediction of turbulent jets and plumes in flowing ambients Shinh-Sing Hwang Iowa State University B. Buoyant Jet in a Stratified Ambient 50 z^ zero momentum height or maximum height of plume rise Greek Symbols a thermal diffusivity, k/pc P.

The influence of ambient fluid stratification on buoyant miscible jets and plumes is studied theoretically and experimentally. Given a fixed set of jet/plume parameters, and an ambient fluid stratification sandwiched between top and bottom homogeneous densities, a theoretical criterion is identified to show how step-like density profiles constitute the most effective mixers within a broad Cited by: 8.

Challenging problems involvrllg jet and plume phenomena are common to many areas of fundamental and applied scientific research, and an understanding of plume and jet behaviour is essential in many geophysical and industrial contexts. For example, in the field of meteorology, where pollutant.

Challenging problems involvrllg jet and plume phenomena are common to many areas of Recent Research Advances in the Fluid Mechanics of Turbulent Jets and Plumes.

Editors (view affiliations) P. Davies where either sewage or thermal effluents are discharged into marine and/or freshwater environments, (ii) in solar ponds, where buoyant. Circular Jet. Zone of flow establishment (jet development; D. o) Zone of established flow (fully developed jet) 4.

Zone of Flow Establishment (ZFE) Extends from the discharge point until water entrained at the edges of the jet affects the centerline velocity. Velocity profile has a top-hat distribution initially, but attains a Gaussian shape at the end of the Size: 1MB. the transport equations are nondimensionalized using the usual plume scaling [Socolofsky and Adams, ] for velocity, length, time, pressure, and temperature where Ri is the Richradson number defined below.

Here is the inlet volume flux, is the reduced gravity at the inlet, is the cross‐section area of a circular source of diameter, and and are the inlet liquid phase velocity and Cited by: AEROPLUME can be used to simulate the jet (plume) development of a release, from a pressurised vessel or from a stack, of a mixture of several non-reacting compounds, which can form one or more single or multi-compound Size: KB.

CONCLUSIONS A numerical study of two-dimensional natural convection flows in a thermally stratified environment has been carried out. Employing the finite difference technique, the transient and the steady-state temperature and velocity profiles are obtained in the flow for various ambient temperature distributions and stratification by: Fluid jet technology: Fundamentals and applications Unknown Binding – January 1, See all formats and editions Hide other formats and editions.

Price New from Used from Unknown Binding, "Please retry" — Format: Unknown Binding, 2. Thermals in Stratified Fluid.- Round Thermals.- Line Thermal.- 3. Plumes in Stratified Fluid.- Round Plume in Linearly Stratified Environment.- Plane Plume in Linearly Stratified Environment.- Plumes in arbitrary density stratification.- 4.

Plume in a Container.- 5. Summary.- 6. Turbulent Round Jet in Coflow.- : Springer.