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Mass coefficients

The added mass force accounts for the resistance of the fluid mass that is moving at the same acceleration as the particle. Neglecting the effect of the particle concentration on the virtual-mass coefficient, for a spherical particle, the volume of the added mass is equal to one-half of the particle volume, so that... [Pg.15]

In this problem, the temperature varies throughout the column and the tower will be divided into increments so that by heat and mass balances the terminal conditions over each section may be found. Knowing the compositions and the temperature, the data given may be used in conjunction with the mass coefficient to calculate the height of the chosen increment. Adiabatic conditions will be assumed and, as the sensible heat change of the gas is small, the heat of solution will be used only to raise the temperature of the liquid. The gas temperature will therefore remain constant at 295 K. [Pg.178]

These mass coefficient values are considered to be maximum values. Field values could be as much as one to two orders of magnitude lower. [Pg.161]

For a given material of known composition, //, can be calculated using a table that gives the mass absorption coefficients of the elements that constitute that material. After calculating the weighted mass coefficient pM (cm2/g) of the material, it is possible to obtain p = pM p where p is expressed in g/cm3. [Pg.242]

The second important term is the virtual mass coefficient (Cv). When the dispersed phase accelerates (or decelerates) with respect to the continuous phase, the surrounding continuous phase has to be accelerated (or decelerated). For such a motion, additional force is needed, which is called added or virtual mass force. This force was given by the second term in Eq. (8). The constant Cy is called the virtual or added mass coefficient. It is difficult to estimate the value of Cv with the present status of knowledge. Therefore, many recommendations are available in the published literature. In an extreme case of potential flow, the value of Cy is 0.5. [Pg.22]

Various model parameters involved in the derivation of the stability criterion need to be specified in order to use the stability criterion for quantitative predictions. Model parameters essential for this purpose include the slip velocity, the virtual mass coefficient, and the dispersion coefficient. The procedure for estimation of these parameters is given for gas-solid (and solid-liquid) fluidized beds and bubble columns. [Pg.40]

Jackson (1985) used a constant value of 0.5 as the virtual mass coefficient, which is for an isolated sphere in an infinite medium. Homsy et al. (1980)... [Pg.41]

Physical properties of the fluid such as density, viscosity, and particle density and the model parameters such as dispersion coefficient and virtual mass coefficient have a substantial effect on the critical diameter. These effects are discussed systematically in the following paragraphs. [Pg.47]

In the case of solid-liquid fluidized beds, the effect of virtual mass is to make the bed more unstable as shown in Fig. 21. This can be explained as follows The effect of virtual mass is to increase the apparent density of the particle. As discussed in this section earlier, an increase in the particle density makes the system more unstable. This observation is consistent with Fig. 21. As the particle density increases, say, ps - 9000 kg/m and Pl = 1000 kg/m, the effect of virtual mass is negligible and the curves are seen to merge irrespective of the formulation of virtual mass coefficient. [Pg.58]

In the case of gas-solid fluidized beds, the effect of virtual mass coefficient is negligible as shown in Fig. 22. However, as the gas density increases the effect of virtual mass becomes similar to that observed in solid-liquid systems as shown in Fig. 23. [Pg.58]

Fig. 21. Effect of formulation of virtual mass coefficient on lower particle critical diameter solid-liquid fluidized beds a = 3.0, /tl = 1 mPas, pi = 1000 kg/m ]. Fig. 21. Effect of formulation of virtual mass coefficient on lower particle critical diameter solid-liquid fluidized beds a = 3.0, /tl = 1 mPas, pi = 1000 kg/m ].
Equation (25) was used to obtain the critical transition gas hold-up. Critical gas transition hold-up is plotted against terminal bubble rise velocity in a typical stability map. The effects of various parameters such as virtual mass coefficient, Richardson-Zaki index, and proportionality constant for dispersion are described next. [Pg.61]

Fig. 25. Effect of virtual mass coefficient on transition gas hold-up bubble columns [a = 0.5, m = 1.9, dB-VBoo Clift et al relation]. Fig. 25. Effect of virtual mass coefficient on transition gas hold-up bubble columns [a = 0.5, m = 1.9, dB-VBoo Clift et al relation].
The material derivative, D/Dt, in this equation should be the derivative pertaining to the dispersed phase particle. The virtual mass coefficient, Cvm, may be a function of the volume fraction of neighboring bubbles. For a single dispersed particle, it is in the range 0.25 to 0.5. For gas-liquid flows, van Wijngaarden (1976) recommended following expression to estimate Cym ... [Pg.97]


See other pages where Mass coefficients is mentioned: [Pg.152]    [Pg.601]    [Pg.30]    [Pg.6]    [Pg.292]    [Pg.325]    [Pg.366]    [Pg.123]    [Pg.36]    [Pg.32]    [Pg.20]    [Pg.41]    [Pg.42]    [Pg.46]    [Pg.58]    [Pg.61]    [Pg.63]    [Pg.69]    [Pg.122]    [Pg.601]    [Pg.756]    [Pg.338]    [Pg.341]    [Pg.433]    [Pg.433]   
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See also in sourсe #XX -- [ Pg.35 , Pg.198 , Pg.212 , Pg.215 , Pg.225 , Pg.292 , Pg.306 , Pg.314 ]




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A Survey of Mass Transfer Coefficients

Absorption column design mass transfer coefficients

Absorption columns mass-transfer coefficients

Absorption mass transfer coefficient

Absorption packing mass transfer coefficients

Activity coefficient mass balance

Aeration mass transfer coefficient

Agitated reactors mass transfer coefficient

Average mass transfer coefficient

Batch mass transfer coefficient

Batch operations mass-transfer coefficient

Binary Mass Transfer Coefficients

Bioreactors mass transfer coefficients

Bubble column mass-transfer coefficients

Bubble columns virtual mass coefficient

Bubbling mass transfer coefficients

CP and mass transfer coefficient

Carried mass coefficient

Carrots mass transfer coefficients

Catalytic mass transfer coefficient

Center-of-mass self-diffusion coefficient

Cocurrent packed columns, mass-transfer coefficients

Coefficients mass heat transfer

Coefficients virtual mass coefficient

Convection mass transfer coefficient

Convective mass transfer coefficients

Conversion of Mass Transfer Coefficients

Correlation of mass-transfer coefficient

Correlations, mass transfer coefficient

Countercurrent columns, mass-transfer coefficients

Cylinders mass-transfer coefficients

Definition of Mass Transfer Coefficients

Derivation of a Correlation for Turbulent Flow Mass Transfer Coefficients Using Dimensional Analysis

Determination of Mass Transfer Coefficient (kLa) in a Municipal Wastewater Treatment Plant (with PULSAR aerators)

Determination of Mass Transfer Coefficients

Dialysis mass transfer coefficient

Different Definitions of the Mass-Transfer Coefficient

Diffusion and mass transfer coefficient

Diffusion mass transfer coefficient species

Dilute solutions mass-transfer coefficients

Dispersed-phase mass-transfer coefficient

Dispersion coefficients mass balance

Dispersion mass transfer coefficients

Distribution coefficients mass related

Effective mass transfer coefficient

Enhancement factor mass transfer coefficient

Equimolecular counterdiffusion mass transfer coefficients

Estimating Effective Intestinal Permeability Coefficient Using a Mass Balance Approach

Estimation of Binary Mass Transfer Coefficients

Estimation of Heat- and Mass-Transfer Coefficients

Estimation of Mass Transfer Coefficients and Film Thickness. Transport in Blood Vessels

Estimation of Mass Transfer Coefficients for Packed Towers

Estimation of Overall Mass Transfer Coefficients A Simplified Result

Evaluation of the Mass-Transfer Coefficient

Examples overall mass transfer coefficients

Extinction coefficient, mass

Extraction continuous-phase mass transfer coefficients

Extraction mass-transfer coefficients

Fickian mass transport coefficient

Film Coefficients of Heat and Mass Transfer

Film Coefficients of Mass Transfer

Film mass transfer coefficient liquid-solid

Film mass transfer coefficients

Fluid surfaces, mass-transfer coefficients

Fluid surfaces, mass-transfer coefficients turbulent flow

Fluidized beds virtual mass coefficient

Fluidized mass transfer coefficient

Forced-convection mass-transfer coefficient

Formation mass accommodation coefficient

Gas dispersion mass transfer coefficients

Gas-film mass transfer coefficient

General mass burning considerations and the evaporation coefficient

Heat and Mass Transfer Coefficient Concepts

Heat and Mass Transfer Coefficients for Flow around Catalyst Particles

Heat and mass exchange coefficients

Heat and mass transfer coefficients

Heat transfer coefficient mass flow rate

Henrys Law and the Mass-Transfer Coefficient

High-shear interface mass transfer coefficient

Hydrogen oxidation reaction mass transfer coefficient

Indirect Determination of Ozone Mass Transfer Coefficients

Interface mass transfer coefficient

Interfacial areas and mass transfer coefficients

Interfacial gradient effects mass transfer coefficients

Interphase mass transfer coefficient

Interphase mass transfers local coefficients

Investigation mass transfer coefficients

Kinetics mass transfer coefficient

Linear mass transfer coefficient

Liquid film reaction mass transfer coefficients

Liquid mass transfer coefficient

Liquid-Solid Mass Transfer Coefficient and Coupling of the Electrode Processes

Liquid-film mass transfer coefficient

Liquid-solid mass-transfer coefficient

Liquid-solid mass-transfer coefficient determination

Local Mass-Transfer Coefficients General Case

Local mass transfer coefficient

Marangoni effect mass, transfer coefficient

Mass Transfer Coefficient and Wall Concentration

Mass Transfer Coefficients for Packed Columns

Mass Transfer Coefficients for Tower Packings

Mass Transfer Coefficients in Laminar Flow Extraction from the PDE Model

Mass absorption coefficient, equations

Mass absorption coefficients

Mass absorption coefficients of the elements

Mass absorption coefficients, table

Mass accommodation coefficients

Mass attenuation coefficient

Mass concentration transfer coefficient

Mass convection analogy between coefficients

Mass diffusivity coefficient

Mass energy absorption coefficient

Mass exchange coefficient

Mass expansion coefficient

Mass film coefficients

Mass flow measurement coefficients

Mass interchange coefficient

Mass overall coefficients

Mass transfer analysis coefficients

Mass transfer area coefficient

Mass transfer between phases film coefficients

Mass transfer between phases overall coefficients

Mass transfer binary diffusion coefficient

Mass transfer coefficient

Mass transfer coefficient bubble diameter effect

Mass transfer coefficient constant, correlation

Mass transfer coefficient diffusion-limited regime

Mass transfer coefficient distillation

Mass transfer coefficient dynamic method

Mass transfer coefficient enhancement

Mass transfer coefficient estimation

Mass transfer coefficient gas-phase

Mass transfer coefficient groups

Mass transfer coefficient interfacial area effect

Mass transfer coefficient interpretation

Mass transfer coefficient liquid phase

Mass transfer coefficient liquid phase diffusivity effect

Mass transfer coefficient measurement

Mass transfer coefficient models:

Mass transfer coefficient multiphase reactor

Mass transfer coefficient permeability constant

Mass transfer coefficient physical properties

Mass transfer coefficient regime similarity

Mass transfer coefficient single particle

Mass transfer coefficient stirrer speed effect

Mass transfer coefficient surface-averaged

Mass transfer coefficient volumetric

Mass transfer coefficient volumetric, experimental data

Mass transfer coefficient, gas-liquid

Mass transfer coefficient, liquid-side model

Mass transfer coefficients agitated vessels

Mass transfer coefficients and

Mass transfer coefficients average values

Mass transfer coefficients bubbles

Mass transfer coefficients conversion

Mass transfer coefficients correlations for

Mass transfer coefficients drops

Mass transfer coefficients experimental determination

Mass transfer coefficients factors influencing

Mass transfer coefficients fixed beds

Mass transfer coefficients fluidized beds

Mass transfer coefficients for adsorption

Mass transfer coefficients for equimolar counterdiffusion

Mass transfer coefficients for packed tower

Mass transfer coefficients from boundary layer theory

Mass transfer coefficients from film theory

Mass transfer coefficients from penetration theory

Mass transfer coefficients from surface renewal theory

Mass transfer coefficients geometries

Mass transfer coefficients in laminar flow around simple

Mass transfer coefficients in laminar flow around simple geometries

Mass transfer coefficients in laminar tubular flow

Mass transfer coefficients in two phase

Mass transfer coefficients individual

Mass transfer coefficients introduction

Mass transfer coefficients limits

Mass transfer coefficients liquid-side

Mass transfer coefficients membranes, separation

Mass transfer coefficients membranes, structure

Mass transfer coefficients models for

Mass transfer coefficients nonreactive measurement

Mass transfer coefficients reactive measurement

Mass transfer coefficients terms Links

Mass transfer coefficients three-phase slurry reactors

Mass transfer coefficients turbulent flow

Mass transfer coefficients types

Mass transfer coefficients typical values

Mass transfer coefficients units

Mass transfer coefficients variation with flow

Mass transfer coefficients with chemical reaction

Mass transfer coefficients, film column)

Mass transfer diffusion coefficient

Mass transfer empirical coefficient correlations

Mass transfer equilibrium distribution coefficient

Mass transfer interdiffusion coefficient

Mass transfer interfacial coefficients

Mass transfer molecular diffusion coefficients

Mass transport coefficient

Mass transport coefficient, overall

Mass transport molecular diffusion coefficient

Mass transport processes oxygen diffusion coefficient

Mass transport rate coefficient

Mass, effective dispersion coefficients

Mass-Transfer Coefficients for Single Cylinders

Mass-Transfer Coefficients for Various Geometries

Mass-Transfer Coefficients for a Single Sphere

Mass-transfer coefficient definition

Mass-transfer coefficient, determination

Mass-transfer coefficients alternate forms

Mass-transfer coefficients boundary-layer theory

Mass-transfer coefficients calculation

Mass-transfer coefficients chemical methods

Mass-transfer coefficients data interpretation

Mass-transfer coefficients film theory

Mass-transfer coefficients flow past solids

Mass-transfer coefficients in adsorption

Mass-transfer coefficients in agitated vessels

Mass-transfer coefficients in laminar flow

Mass-transfer coefficients in packed beds

Mass-transfer coefficients in packed towers

Mass-transfer coefficients in turbulent flow

Mass-transfer coefficients inside pipes

Mass-transfer coefficients physical methods

Mass-transfer coefficients relations between

Mass-transfer coefficients, analogy with

Mass-transfer coefficients, analogy with rates

Mathematical models mass Transfer Coefficient

Matrix mass transfer coefficients

Measurement of Mass Transfer Coefficients

Membrane contactors mass transfer coefficients

Membrane mass-transfer coefficient

Microstructured mass transfer coefficient

More about Mass Transfer Coefficients

Multicomponent Mass Transfer Coefficients

Other Definitions of Mass Transfer Coefficients

Overall Driving Forces and Mass Transfer Coefficients

Overall mass transfer coefficient

Oxygen mass transfer coefficient

Packed beds mass-transfer coefficients

Packed columns mass-transfer coefficients

Packed towers mass-transfer coefficients

Packed towers, separations mass transfer coefficients

Parameters mass transfer coefficients

Particle mass transfer coefficients

Phenol, mass transfer coefficient

Piston flow model with mass transfer coefficient

Plate columns, mass-transfer coefficients

Predicting the Mass Transfer Coefficient

Prediction of Mass Transfer Coefficients

Product mass transfer coefficient

Reaction mass transfer coefficient

Scattering coefficient: mass attenuation

Side mass transfer coefficient

Sieve-plate columns, mass-transfer coefficients

Slurry reactors mass-transfer coefficient

Solid-Liquid Mass Transfer Coefficient in Stirred Tank Reactor

Solid-phase mass transfer coefficient

Soluble release mass-transfer coefficient

Solute Diffusion and Mass-Transfer Coefficients

Solute mass-transfer coefficient

Spheres, mass transfer coefficient

Spray towers, mass-transfer coefficients

Surface , mass-transfer coefficients

Taylor flow film mass transfer coefficient

The Mass-Transfer Coefficient

Transport coefficients mass transfer coefficient

True mass transfer coefficient

Tube reactors, mass transfer coefficients

Turbulent mass transfer coefficient

Turbulent multicomponent mass transfer coefficients

Velocity and mass transfer coefficients

Virtual mass coefficient

Volumetric Mass Transfer Coefficient, kLa

Volumetric gas side mass transfer coefficient

Volumetric liquid side mass transfer coefficient

Volumetric overall mass-transfer coefficients

X-rays mass absorption coefficient

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