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Friday, July 17, 2020 | History

3 edition of Radiative interactions in laminar duct flows found in the catalog.

Radiative interactions in laminar duct flows

Radiative interactions in laminar duct flows

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  • 4 Currently reading

Published by Institute for Occupational and Applied Mechanics (ICAM), Old Dominion University in Norfolk, Va .
Written in English

    Subjects:
  • Radiative transfer.,
  • Laminar flow.

  • Edition Notes

    Statementby P.A. Trivedi and S.N. Tiwari.
    SeriesODU/ICAM report -- 90-101., NASA-CR -- 188150., NASA contractor report -- NASA CR-188150.
    ContributionsTiwari, S. N., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15298980M

    Abstract— In the present study laminar flow through a rectangular duct filled with discrete porous media, with water as working fluid is investigated numerically. Simulation has been carried out using open source CFD package OpenFOAM. The effect of Reynolds number on the velocity profile is . Osborne Reynolds suggested that the nature of the flow of a fluid depends on its density, flow rate, the dimensions of the container through which it is flowing, and its viscosity. This deduction led to the classification of the flow mechanisms into two broad categories: laminar flow and turbulent flow. We have tried to simplify them, to help you understand this aspect of fluid dynamics better.

    Abstract We report measurements and a model of gas flow through a helical duct of rectangular cross section. The measurements on helium, nitrogen, argon, and sulfur hexafluoride yielded molar flow rates from observations of the rate of rise of pressure in a known volume located downstream from the fixdemocracynow.com by: 4. Laminar Flow. In fluid dynamics, laminar flow is characterized by smooth or in regular paths of particles of the fluid, in contrast to turbulent flow, that is characterized by the irregular movement of particles of the fixdemocracynow.com fluid flows in parallel layers (with minimal lateral mixing), with no disruption between the fixdemocracynow.comore the laminar flow is also referred to as streamline or.

    This investigation is concerned with those fluid-mechanical problems in which the pressure distribution is determined by the interaction between an external, supersonic inviscid flow and an inner, laminar viscous layer. The boundary-layer approximations are assumed to remain valid throughout the viscous region, and the integral or moment method of Lees and Reeves, extended to include flows Cited by: Laminar Flow Forced Convection in Ducts by R. K. Shah, , Laminar flow forced convection in ducts a source book for compact heat exchanger analytical data , Convection, Laminar flow, Design and construction. There's no description for this book yet. Can you add one? Edition NotesCited by:


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Radiative interactions in laminar duct flows Download PDF EPUB FB2

Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied. Jan 01,  · The problem of energy transfer in a thermally developing, radiating and conducting medium is studied.

In particular, laminar flow of carbon monoxide is considered although the results may be interpreted more generally as referring to any infra red radiating diatomic gas.

The effects of radiation and conduction on the temperature profile and the Nusselt number are presented for slug flow and Cited by: 2.

There are many studies about laminar convection flow over BFS in a duct by several investigators. Kondoh et al. studied laminar heat transfer in a separating and reattaching flow, numerically, by simulating the flow and heat transfer downstream of a backward-facing step.

The effects of channel expansion ratio, Reynolds number and Prandtl Cited by: Spectrally correlated radiation and laminar forced convection in the entrance region of a circular duct of these models are compared in the case of coupled radiative and convective strongly non-isothermal heating or cooling laminar gas flows.

The choice of CK and ADF as narrow and global models results from their formulation in terms of Cited by: For laminar flow, the entrance region can be found form the following empirical correlation.

Ø @ 4 A ×. = I E J = N ; Assuming the maximum Re for the laminar flow in a Radiative interactions in laminar duct flows book is Red,crit = the longest laminar developing region becomes: Le = d, i.e. times of the tube diameter. Spectrally correlated radiation and laminar forced convection in the entrance region of a circular duct Article in International Journal of Heat and Mass Transfer 45(25) · December Laminar Flow Forced Convection in Ducts is a sourcebook for compact heat exchanger analytical data.

This book describes the analytical solutions for laminar fluid flow and forced convection heat transfer in circular and noncircular pipes, including applicable differential equations and boundary conditions involving velocity and temperature problems of fluid flow.

Radiative heat transfer or thermal radiation is the science of transferring energy in the form of electromagnetic waves. Unlike heat conduction, electromagnetic waves do not require a medium for.

May 31,  · Abstract. Present study investigates the effects of combined mixed convection and thermal radiation for laminar ascending flows. Finite volume method is applied for solving mass, momentum and energy balance equations simultaneously and for radiation transfer equation (RTE) discrete ordinate method is fixdemocracynow.com by: 6.

Laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity and viscosity of the fluid: laminar flow or turbulent flow.

Laminar flow occurs at lower. analytical solutions for laminar flows in circular pipes, information on the non-circular case it is scant. In order to study the effects of dispersion at the initial stages of spreading in a square duct a numerical method has been devised. A feature of the approach is that numerical dispersion is negligible, and as a.

Apr 26,  · The stability of the laminar flow in a rectangular duct of an arbitrary aspect ratio is investigated numerically by expanding the flow fields of both the main flow and the disturbance into series of Legendre polynomials and solving the eigenvalue problem of the resulting matrix fixdemocracynow.com by: LAMINAR FLOW HEAT TRANSFER IN THE THERMAL ENTRANCE REGION OF FLAT AND PROFILED DUCTS A.

MUNTJEWERF Local Nu-numbers of duct VIII after correction for radial viscos­ 3. in laminar flows the influence of the temperature dependence of the fluid). Analysis of laminar boundary layer flow along a stretching cylinder in the presence of thermal radiation. been use to model the radiative heat transfer.

Using the similarity transformation, the partial differential transverse curvature effect for isothermal laminar flows. He has reported that the local skin friction.

dimensional and axisymmetrical flows and to demonstrate the gener- ality of the method of analysis for solving laminar film boiling problems. Previous studies [] of film boiling have been concerned with the situation where all motions are induced by gravity forces and where forced convection is absent.

T1 - Experiments on laminar flow development in rectangular ducts. AU - Sparrow, E. AU - Hixon, C. AU - Shavit, G. PY - /1/1. Y1 - /1/1. N2 - The development of the laminar velocity and pressure fields in the hydrodynamic entrance region of rectangular duels Cited by: Laminar flow, type of fluid (gas or liquid) flow in which the fluid travels smoothly or in regular paths, in contrast to turbulent flow, in which the fluid undergoes irregular fluctuations and mixing.

In laminar flow, sometimes called streamline flow, the velocity, pressure, and other flow. Real world applications of laminar flow: * Microfluidics * Pump and duct design * Blood flow (haemodynamics) * Nanofluids and nanodevices * Composites and plastics molding * Hydraulics * Insect flight (biomimetics) * UAVs.

methods, equations, and data described in this book, but they do not guarantee them for any particular fixdemocracynow.com authors and publisher offer no warranties or representations, nor do they accept any liabilities with respect to the use of this fixdemocracynow.com.

Pressure Drop in Laminar Developing Flow in Noncircular Ducts: A Scaling and Modeling Approach A detailed review and analysis of the hydrodynamic characteristics of laminar developing and fully developed flows in noncircular ducts is presented.

New models are proposed. Apr 12,  · IN order to analyze the performance of such an apparatus, it is necessary to understand pressure driven flow in a duct whose cross section is an equilateral triangle.

a.) Verify that the velocity distribution for the laminar flow of a newtonian fluid in a duct of this type is given by: vz= ((P1-P2)/(4uLH))(y-H)(3x^2-y^2) b.).Laminar Flow Forced Convection in Ducts: A Source Book for Compact Heat Exchanger Analytical Data [R. K. Shah, Thomas F. Irvine, James P.

Hartnett, A. L. Cited by: Laminar and Turbulent Flow Summary • Laminar Flow Layers of water flow over one another at different speeds with virtually no mixing between layers. The flow velocity profile for laminar flow in circular pipes is parabolic in shape, with a maximum flow in the center of the pipe and a minimum flow at the pipe walls.