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Friday, May 8, 2020 | History

2 edition of mass transfer measurements in turbulent pipe-flow. found in the catalog.

mass transfer measurements in turbulent pipe-flow.

Nadjmeh Kaahtoon Amooie Foumeny

mass transfer measurements in turbulent pipe-flow.

by Nadjmeh Kaahtoon Amooie Foumeny

  • 369 Want to read
  • 37 Currently reading

Published in Bradford .
Written in English


Edition Notes

M.Sc. dissertation. Typescript.

SeriesDissertations
The Physical Object
Pagination90p.
Number of Pages90
ID Numbers
Open LibraryOL13784509M

  A new model for the heat transfer in turbulent pipe flow is presented based on a modified form of the mixing length theory developed by Cebeci [1] for boundary layer flow problems. The model predicts the velocity and temperature distributions and the Nusselt number for fluids with low, medium and high Prandtl numbers (Pr to 15) and fits the available experimental data very Cited by: Indication of Laminar or Turbulent Flow The term fl tflowrate shldbhould be e reprepldbR ldlaced by Reynolds number,,where V is the average velocity in the pipe, and L is the characteristic dimension of a flow.L is usually D R e VL / (diameter) in a pipe flow. in a pipe flow. --> a measure of inertial force to the > a measure of inertial force to theFile Size: 2MB.

other situations where turbulent flow is transfer the required heat exchanger if the flow were rly, the required mass transfer of aliquid state to a vapor state (such as is needed in the evaporated cooling system Fully Developed Pipe Flow Turbulent Cannotbesolvedexactly(toocomplex). The eddy diffusivity of mass reported by Shulman et al. () and Virk's () velocity profile corresponding to the maximum mass transfer reduction in turbulent pipe flow were applied to the present analysis. The mass transfer entry length for these fluids was found to be pipe diameters depending on the Reynolds number.

principles and techniques in the measurement of turbulent flows. Another book on turbulent flow by Schlichting (79) takes the more basic mathematical approach to the subject with particular emphasis on the use of boundary layer theory. Special emphasis in this book is given to the origin of turbulence and to the solution of boundary layer. In laminar flow, viscous forces (forces of attraction) create interaction between the layers and thus the mass transfer. In case of turbulent flow, an additional mechanism is present to cause the extra mass transfer and that's the formation of edd.


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Mass transfer measurements in turbulent pipe-flow by Nadjmeh Kaahtoon Amooie Foumeny Download PDF EPUB FB2

Mass transfer in turbulent pipe flow section was made from 9 pieces of nickel tube with an inner diameter of mm and varying lengths, i.e. ,,mm. They were manufactured to a tolerance of mm with a polished inner surface ensuring a roughness of about l um, i.e.

much smaller than the calculated concentration boundary-layer thickness ( urn).Cited by: The object of this study has been the measurement of concentration profiles of water vapor in a wetted‐wall column with fully developed turbulent pipe flow of air for several positions downstream of the inlet.

The air Reynolds number Cited by: 7. This paper deals with the extraction of turbulent structure correlated with the wall mass transfer in a curved swirling pipe flow behind an orifice.

The cross-sectional velocity field behind the orifice is measured by the Stereo Particle Image Velocimetry (SPIV) and the results are analyzed by the proper orthogonal decomposition (POD).Cited by: 1. Flow and mass transfer phenomena in turbulent flow in a circular pipe containing a ring obstruction of rectangular cross section is studied.

Mass transfer rates at the pipe wall in the separated flow region behind the obstruction are measured using the electrochemical technique (Schmidt number = ) within the Reynolds number ra to ,Cited by: 2.

turb - turbulent diffusivity (for mass flux relative to mass avg. velocity) • µ turb - eddy viscosity • Typically, Sc turb is specified. MODEL for turbulent species diffusive flux: ⇥ (⇥¯ iv¯) + 1 ⇥ j i,turb = s¯ i/ Multicomponent effects are irrelevant at sufficiently high Re.

constant properties & density j i,turb = D mass transfer measurements in turbulent pipe-flow. book i Sc turb = turb. Heat and momentum transfer in the wall region of turbulent pipe flow have been measured by employing a combined cold wire and V-shaped hot wire anemometry technique developed by.

Hughmark, Wall region mass transfer for large Schmidt numbers in turbulent pipe flow, AIChE Journal, 23, 4, (), (). Wiley Online Library D.D. Kale, An analysis of heat transfer to turbulent flow of drag reducing fluids, International Journal of Heat and Mass Transfer, 20, 10, (), ().

The problem of turbulent pipe flow with mass removal at the bounding surface is analyzed, and numerical results are presented for the friction factor, axial pressure gradient, heat and mass transfer coefficients, and velocity and temperature profiles.

The results, which are relevant to forced-convection condensation in a tube (either with or without noncondensable gases) are shown to be substantially Cited by: The measurement results of mass transfer and resistance in turbulent flow of an aqueous polyoxy solution past a plate are discussed. Select ON INSTABILITIES IN POISEUILLE AND COUETTE FLOWS OF VISCOELASTIC FLUIDS.

Book chapter Full text access. ON INSTABILITIES IN POISEUILLE AND COUETTE FLOWS OF VISCOELASTIC FLUIDS. Effects of film vaporization on turbulent mixed convection heat and mass transfer in a vertical channel. International Journal of Heat and Mass Transfer, Vol. 38, Issue. 4, p. International Journal of Heat and Mass Transfer, Vol.

38, Issue. 4, p. Cited by: Mass Transfer in Multiphase Systems and its Applications 2. Analogy for mass transfer and wall shear stress in two-phase flow Introduction The combined flow of gas and liquid intensifies significantly the heat and mass transfer processes on the walls of tubes and different channels and increases pressure drop in.

Corresponding Author. Ethyl Corporation, Baton Rouge, Louisiana Ethyl Corporation, Baton Rouge, Louisiana Search for more papers by this authorCited by:   In the present work, the flow pattern in pipe flow has been simulated using a low-Reynolds-number k−ε model.

The model has been extended to predict the heat-transfer coefficient in regions of both high and low Prandtl number. The computational fluid dynamic (CFD) approach has been shown to be superior to the conventional semiempirical approach for high turbulent Prandtl numbers Cited by: Heat Transfer on a Plate in the Presence of Laminar-Turbulent Transition and Increased Turbulence of the External Flow.

Near Wall Turbulence Under the Influence of Intensive Mass Transfer. A New Experimental Technique for Boundary Layer Investigations.

Physical Nature of Heat Transfer in Nonuniform Porous Structures. Electrochemical Mass Transfer Measurements with Glycerin Used To Reach High Schmidt Numbers. Industrial & Engineering Chemistry Research44 (19), DOI: /ie Mahesh T.

Dhotre and, Jyeshtharaj B. Joshi. CFD Simulation of Heat Transfer in Turbulent Pipe by:   An Introduction to Turbulence and Its Measurement is an introductory text on turbulence and its measurement. It combines the physics of turbulence with measurement techniques and covers topics ranging from measurable quantities and their physical significance to the analysis of fluctuating signals, temperature and concentration measurements, and the hot-wire Edition: 1.

The present book is a handout lectures for the Course ME Advanced Heat Transfer / II – Convection & Mass Transfer. The course is designed for Students in the Mechanical. Back to Advanced Heat and Mass Transfer Home. «External Convective Heat and Mass Transfer Natural Convection». Table of Contents.

Papers are presented on optical measurement methods, developments in heat and mass transfer measurement, and power engineering measurements. Consideration is given to laser beam techniques for measuring two-phase boundary motion in boiling, the use of flow visualization and thermometric probes for studies of turbulent transfer in a viscous sublayer, natural convection, and an Cited by: 9.

Optical Measurements: Techniques and Applications (Heat and Mass Transfer) 2nd ed. Softcover reprint of the original 2nd ed.

Edition and a second one mathematically modelling transport processes like laminar or turbulent diffusion. For reliably predicting the heat transfer, for example, the velocity and temperature field in the Format: Paperback.

Purchase Progress in Heat and Mass Transfer - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1.effect of electrode rnisalignment on corrosion rate measurements in turbulent pipe flow.

The effect of the mass transfer entry length was also taken into consideration. Both protruding and recessed electrodes were considered with misalignment in the range O to Pm. The determination of the effect for paddy mass transfer controlled corrosion.

Mass transfer coefficient measurements in two-phase (oil/ferri-ferrocyanide) and three-phase (oil/ferri-ferrocyanide/nitrogen) flow using limiting current density technique were made in cm-dia pipe at 25 and 75 percent oil percentage. Mass transfer coefficients in full pipe oil/water flow and slug flow were by: