Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Model transfer

Metal to ceramic (oxide) adhesion is very important to the microelectronics industry. An electron transfer model by Burlitch and co-workers [75] shows the importance of electron donating capability in enhancing adhesion. Their calculations are able to explain the enhancement in adhesion when a NiPt layer is added to a Pt-NiO interface. [Pg.454]

Figure C3.2.7. A series of electron transfer model compounds with the donor and acceptor moieties linked by (from top to bottom) (a) a hydrogen bond bridge (b) all sigma-bond bridge (c) partially unsaturated bridge. Studies with these compounds showed that hydrogen bonds can provide efficient donor-acceptor interactions. From Piotrowiak P 1999 Photoinduced electron transfer in molecular systems recent developments Chem. Soc. Rev. 28 143-50. Figure C3.2.7. A series of electron transfer model compounds with the donor and acceptor moieties linked by (from top to bottom) (a) a hydrogen bond bridge (b) all sigma-bond bridge (c) partially unsaturated bridge. Studies with these compounds showed that hydrogen bonds can provide efficient donor-acceptor interactions. From Piotrowiak P 1999 Photoinduced electron transfer in molecular systems recent developments Chem. Soc. Rev. 28 143-50.
The time constants characterizing heat transfer in convection or radiation dominated rotary kilns are readily developed using less general heat-transfer models than that presented herein. These time constants define simple scaling laws which can be used to estimate the effects of fill fraction, kiln diameter, moisture, and rotation rate on the temperatures of the soHds. Criteria can also be estabHshed for estimating the relative importance of radiation and convection. In the following analysis, the kiln wall temperature, and the kiln gas temperature, T, are considered constant. Separate analyses are conducted for dry and wet conditions. [Pg.49]

Comparisons of the complete heat-transfer model with pilot-scale rotary kiln data are shown iu Figure 5 (21) for moisture levels ranging from 0 to 20 wt %. The tremendous thermal impact of moisture is clearly visible iu the leveling of temperature profiles at 100°C. [Pg.50]

Theoretical Transfer Model Transfer from single droplets is theoretically well defined for the gas side. For a droplet moving counter to a gas, interfacial area is (in consistent units)... [Pg.1401]

In formulating and applying a gradient transfer model, what are two of the maji x difficulties ... [Pg.344]

Population transfer model Herring Keyes [55H01, 60K01]... [Pg.91]

Bolles and Fair [129] present an analysis of considerable data in developing a mass-transfer model for packed tower design however, there is too much detail to present here. [Pg.377]

Further experiments were conducted in a large aeration tank, 15 litres batch system to study die dry weight cell density, COD, carbohydrate, dissolved oxygen and oxygen transfer modelling. Two different airflow rates, 5 and 10 litres/min, were applied. However,... [Pg.47]

D, W. Blair, CombustFlame 20 (1), 105—9 (1973) CA 78, 113515 (1973) A simple heat-transfer model is coupled with an Arrhenius-type pyrolysis law to study the effect of solid-state heat-transfer losses on burning rates of solid rocket-proplnt strands. Such heat-transfer losses materially affect the burning rates and also cause extinction phenomena similar to some that had been observed exptly. Strand diam and compn, adiabatic burning rate, and the heat-transfer film coeff at the strand surface are important variables. Results of theoretical analysis are applied to AP-based composite solid proplnts... [Pg.940]

Propagation of Gasless Reactions in Solids , Combustion Flame 21, No 1 (1973), 91-97 69) B.E. Douda, Radiative Transfer Model of a Pyrotechnic Flare , NAD-RDTR No 258... [Pg.1000]

In Proceedings of 21st SemiTherm Symposium, San Jose, 15-17 March 2005, pp 1-7 Copeland D, Behnia M, Nakayama W (1997) Manifold micro-channel heat sinks isothermal analysis. IEEE Trans Comp Packag Manuf Technol A 20 96-102 Dupont V, Thome JR, Jacobi AM (2004) Heat transfer model for evaporation in microchannels. [Pg.93]

Thome JR, Dupont V, Jacobi AM (2004) Heat transfer model for evaporation in microchannels. [Pg.97]

Reynolds number. It should be stressed that the heat transfer coefficient depends on the character of the wall temperature and the bulk fluid temperature variation along the heated tube wall. It is well known that under certain conditions the use of mean wall and fluid temperatures to calculate the heat transfer coefficient may lead to peculiar behavior of the Nusselt number (see Eckert and Weise 1941 Petukhov 1967 Kays and Crawford 1993). The experimental results of Hetsroni et al. (2004) showed that the use of the heat transfer model based on the assumption of constant heat flux, and linear variation of the bulk temperature of the fluid at low Reynolds number, yield an apparent growth of the Nusselt number with an increase in the Reynolds number, as well as underestimation of this number. [Pg.151]

Analytical analyses for the growth of a single bubble have been performed for simple geometrical shapes, using a simplified heat transfer model. Plesset and Zwick (1954) solved the problem by considering the heat transfer through the bubble interface in a uniformly superheated fluid. The bubble growth equation was obtained... [Pg.286]

Weislogel MM, Lichter S (1998) Capillary flow in an interior corner. 1 Eluid Mech 373 349-378 Wu PY, Little WA (1984) Measurement of the heat transfer characteristics of gas flow a fine channels heat exchangers used for microminiature refrigerators. Cryogenics 24 415 20 Xu X, Carey VP (1990) Film evaporation from a micro-grooved surface an approximate heat transfer model and its comparison with experimental data. J Thermophys 4(4) 512-520 Yarin LP, Ekelchik LA, Hetsroni G (2002) Two-phase laminar flow in a heated micro-channels. Int J Multiphase Flow 28 1589-1616... [Pg.377]

This paper will discuss the formulation of the simulator for the filament winding process which describes the temperature and extent of cure in a cross-section of a composite part. The model consists of two parts the kinetic model to predict the curing kinetics of the polymeric system and the heat transfer model which incorporates the kinetic model. A Galerkin finite element code was written to solve the specially and time dependent system. The program was implemented on a microcomputer to minimize computer costs. [Pg.257]

The heat transfer model, energy and material balance equations plus boundary condition and initial conditions are shown in Figure 4. The energy balance partial differential equation (PDE) (Equation 10) assumes two dimensional axial conduction. Figure 5 illustrates the rectangular cross-section of the composite part. Convective boundary conditions are implemented at the interface between the walls and the polymer matrix. [Pg.261]

Figure 4. Heat transfer model, energy and material balance equations, boundary and initial conditions plus physical properties. Figure 4. Heat transfer model, energy and material balance equations, boundary and initial conditions plus physical properties.
The use of integrated reactor and heat-transfer models is essential for scale-up. Figure 11.7 shows an early reactor design for the same chemistry that was developed without the use of integrated models. Other unoptimized designs with temperature spikes have also been reported [12,44]. Integrated models were used to... [Pg.248]

No slip Is used as the velocity boundary conditions at all walls. Actually there Is a finite normal velocity at the deposition surface, but It Is Insignificant In the case of dilute reactants. The Inlet flow Is assumed to be Polseullle flow while zero stresses are specified at the reactor exit. The boundary conditions for the temperature play a central role in CVD reactor behavior. Here we employ Idealized boundary conditions In the absence of detailed heat transfer modelling of an actual reactor. Two wall conditions will be considered (1) adiabatic side walls, l.e. dT/dn = 0, and (11) fixed side wall temperatures corresponding to cooled reactor walls. For the reactive species, no net normal flux Is specified on nonreacting surfaces. At substrate surface, the flux of the Tth species equals the rate of reaction of 1 In n surface reactions, l.e. [Pg.357]

To simulate the empirical concentration profiles, an appropriate mass-transfer model has to be used. One of the simplest models is the model based on the equilibrium-dispersive model, frequently used in column chromatography [1]. It can be given by the following equation ... [Pg.34]

The most spectacular peak profiles, which suggest self-associative interactions, were obtained for 5-phenyl-1-pentanol on the Whatman No. 1 and No. 3 chromatographic papers (see Figure 2.15 and Figure 2.16). Very similar band profiles can be obtained using the mass-transfer model (Eqnation 2.21), coupled with the Fowler-Guggenheim isotherm of adsorption (Equation 2.4), or with the multilayer isotherm (Equation 2.7). [Pg.35]

Experimental gas-solid mass-transfer data have been obtained for naphthalene in CO2 to develop correlations for mass-transfer coefficients [Lim, Holder, and Shah, Am. Chem. Soc. Symp. Ser, 406, 379 (1989)]. The mass-transfer coefficient increases dramatically near the critical point, goes through a maximum, and then decreases gradually. The strong natural convection at SCF conditions leads to higher mass-transfer rates than in liquid solvents. A comprehensive mass-transfer model has been developed for SCF extraction from an aqueous phase to CO2 in countercurrent columns [Seibert and Moosberg, Sep. Sci. Techrwl, 23, 2049 (1988) Brunner, op. cit.]. [Pg.16]


See other pages where Model transfer is mentioned: [Pg.387]    [Pg.23]    [Pg.343]    [Pg.52]    [Pg.156]    [Pg.1348]    [Pg.2003]    [Pg.241]    [Pg.56]    [Pg.1057]    [Pg.365]    [Pg.179]    [Pg.413]    [Pg.46]    [Pg.324]    [Pg.389]    [Pg.368]    [Pg.269]    [Pg.246]    [Pg.249]    [Pg.18]    [Pg.188]    [Pg.485]   
See also in sourсe #XX -- [ Pg.785 ]




SEARCH



A Fundamental Model of Mass Transfer in Multicomponent Distillation

A Model for the Electron Transfer Complex

A Simplified One-Dimensional Heat Transfer Model

A simple model for electron-transfer reactions

Adsorption model for interfacial transfer

Air-sea gas transfer models

All-Atom Models for Proton Transfer Reactions in Enzymes

Atmospheric gases transfer models

Basic Mass Transfer Models

Basic Models of Computational Mass Transfer

Basic Models of Heat Transfer in Packed Beds

Bioheat transfer modeling

Biological transfer models

Biological transfer models approach

Biological transfer models molecular dynamics

Biological transfer models molecular mechanics

Biological transfer models potential energy surface

Biological transfer models quantum molecular

Bond transfer model

Bubble column, mass transfer models

Build-operate-transfer model

Butler-Volmer model transfer coefficient

CSTR, mass transfer model

Carbon clusters transferable model

Case Study Comparison of DFT Functionals on Model Phosphoryl Transfer Reactions

Charge transfer model

Charge-transfer impurity model

Closed-transfer system Model

Column chromatography mass-transfer model

Compartmental model mass transfer

Computer modeling stabilization energy transfer

Continuous-stirred-tank reactor, mass transfer model

Continuum heat transfer models

Continuum heat transfer models homogeneous

Contrast transfer function model

Default Control Structure and Simplified Heat Transfer Models

Dielectric continuum model, electron-transfer

Dissociative electron transfer Morse curve model

Electrochemical mass-transfer studies, model

Electrochemical mass-transfer studies, model reactions used

Electrode Models Based on a Mass Transfer Analysis

Electron Transfer Mechanisms in Molybdenum and Tungsten Model Compounds

Electron transfer Marcus model

Electron transfer Marcus-Hush model

Electron transfer classical model

Electron transfer kinetic model, flavocytochrome

Electron transfer model approximation

Electron transfer model systems

Electron transfer models

Electron transfer models for

Electron transfer pathway model

Electron transfer porphyrin-based models

Electron transfer proteins, modeling

Electron transfer quantum mechanical model

Electron transfer rate model rates

Electron transfer semi-classical model

Electron transfer semiclassical model

Electron transfer superexchange model

Electron transfer theoretical models

Electron transfer tunneling pathway model

Electron-transfer reactions superoxide dismutase models

Energy back-transfer model

Energy transfer models

Energy transfer, simplest models

Enzyme transfer model

Experimental Test of Bridge-assisted Electron Transfer Models

Experimental Testing of the Electron Transfer Models

Exponential model transfer reactions

Film Model for Binary Mass Transfer

Full-scale fire modeling heat transfer

Gas- -Liquid Mass Transfer Models

HETP Prediction—Mass Transfer Models

Heat transfer heterogeneous model

Heat transfer in the two-dimensional model

Heat transfer lumped parameter model

Heat transfer mathematical models

Heat transfer mechanistic model

Heat transfer mesoscale model

Heat transfer model

Heat transfer model comparison

Heat transfer model processing

Heat transfer model scale

Heat transfer model solution procedure

Heat transfer modeling

Heat transfer modelling

Heterogeneous electron transfer Butler-Volmer model

Ion transfer models

K/BxN serum transfer model

Kinetic isotope effects, benzophenoneA/iV-dimethylaniline proton-transfer classical model

Kinetic isotope effects, benzophenoneA/iV-dimethylaniline proton-transfer semiclassical/quantum model comparisons

Kinetic mass transfer model

Kinetic models mass transfer resistance

Light-induced Energy Transfer in Model Systems

Limestone mass transfer model

Linear driving force model, for mass transfer

Linear-transfer model

Lumped parameter model mass transfer

Marcus model of electron transfer

Marcus model of proton transfer

Mass Transfer Coefficients in Laminar Flow Extraction from the PDE Model

Mass transfer Butler-Volmer model

Mass transfer Higbie model

Mass transfer Maxwell-Stefan model

Mass transfer boundary-layer models

Mass transfer coefficient models:

Mass transfer coefficient, liquid-side model

Mass transfer coefficients models for

Mass transfer irreversible thermodynamics model

Mass transfer linear driving force model

Mass transfer mathematical models

Mass transfer mesoscale model

Mass transfer model equations

Mass transfer model equations boundary conditions

Mass transfer model equations system geometry

Mass transfer model, solution

Mass transfer modeling membrane process

Mass transfer modeling nanofiltration

Mass transfer modeling pervaporation

Mass transfer modeling reverse osmosis

Mass transfer models

Mass transfer models Higbie penetration

Mass transfer models film theory

Mass transfer models for

Mass transfer models laminar boundary layer theory

Mass transfer models penetration theory

Mass transfer models slip velocity

Mass transfer models surface-renewal theory

Mass transfer models turbulence

Mass transfer penetration model

Mass transfer resistance model

Mass transfer stagnant-film model

Mass transfer surface renewal model

Mass transfer-based modelling

Mass transfer—the Skovborg-Rasmussen model

Material balance equations, mass transfer model

Mathematical model for mass transfer

Mathematical modeling physical-mass transfer models

Mathematical models mass Transfer Coefficient

Membrane process, mass transfer modeling separation

Membrane process, mass transfer modeling transport

Mesoscale model momentum transfer

Metal clusters charge transfer model

Model Studies of Hydride-transfer Reactions

Model acceptance for transfer-function-based technique predictability

Model charge transfer system

Model for charge transfer

Model kinetics mass-transfer

Model mass transfer rates

Model molecular systems with possible proton transfer

Modeling Hydrogen Transfer Reactions

Modeling electron transfer from

Modeling first electron transfer

Modeling first electron transfer reaction centers

Modeling heat transfer enhancement

Modeling mass transfer effects

Modeling transference number

Modelling mass transfer processes

Models accounting for diffusional mass transfer

Models for Nicotinamide-mediated Hydrogen Transfer

Models for Transfer at a Gas-Liquid Interface

Models linear discrete-time transfer

Models molecules with charge transfer

Models of Bond-Breaking Ion and Electron Transfer Reactions

Models of Energy Transfer and Adsorption

Models of electrochemical electron transfer kinetics

Models open with mass transfer

Models reservoir transfers

Models which include external mass-transfer effects

Modified Penetration Model for Rotary Kiln Wall-to-Bed Heat Transfer

Molecular dynamics transferable carbon model

Momentum Transfer Model

Multicomponent Distillation Mass Transfer Models

Multicomponent Film Models for Mass Transfer in Nonideal Fluid Systems

Multivariate calibration models transfer

Multivariate calibration models transfer standardization methods

Myoglobin, energy transfer models

Numerical solutions mass transfer model equations

Outer-sphere electron transfer classical model

Parameterization of Mass Transfer and Kinetic Models

Pharmacokinetic models, mass transfer

Phase transfer model

Phosphoryl transfer model reactions

Photoinduced electron transfer reaction center models

Photosynthetic bacteria electron-transfer models

Piston flow model with mass transfer

Piston flow model with mass transfer coefficient

Primary event electron transfer model

Probabilistic Transfer Models

Proton Transfer Reactions and the EVB Model

Proton Transfer to and from Carbon in Model Reactions

Proton transfer Bell model

Proton transfer Levich model

Proton transfer model

Proton-transfer reactions Borgis-Hynes model

Proton-transfer reactions Lee—Hynes model

Proton-transfer reactions classical model

Proton-transfer reactions model

Proton-transfer reactions semiclassical model

Proton-transfer reactions semiclassical/quantum model

Radiative transfer climate modeling

Reaction center proteins, modeling electron transfer from

Ruthenium electron-transfer protein models

SERS model, charge transfer

Selective energy transfer model

Silicon clusters transferable model

Simple Charge Transfer Model for Electronegativity Neutralization

Simplification of the Generalized Mass Transfer Equation for a One-Dimensional Plug Flow Model

Single Particle Heat Transfer Modeling for Expanded Shale Processing

Single Particle Models - Mass- and Heat-transfer Resistances

Single-pore model, mass transfer

Slags heat transfer model

Sorption-desorption moisture transfer model

Spin transfer models

Spin-boson model, electron-transfer

Steric model phase-transfer

Technology transfer model

The Marcus-Hush Model of Electron Transfer

The charge-transfer model

Theoretical Analysis and Models for Heat Transfer

Transfer Coefficients and Process Modeling

Transfer RNA molecular model

Transfer functions model

Transfer matrix model

Transfer matrix of the inverse model

Transfer modeling, mass

Transfer of calibration models

Transfer reactions model rates

Transfer units fundamental model

Transferring Protons Atomic Models

Two-Film Mass-Transfer Model for Gas-Liquid Systems

Unsteady-State Mass Transfer Models

Valence-bond charge transfer model

© 2024 chempedia.info