Global ETD Search
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Showing 1 to 13 of 13 for “"Pseudo-steady state"”.
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A Numerical Model for Flux Decline During the Crossflow Ultrafiltration of Colloidal Suspensions
… in crossflow filtration quickly reaches a steady-state for constant boundary conditions. Hence, the unsteady nature of the permeate flux decline must be caused by changes in the hydraulic boundary condition at the membrane surface due to cake formation during filtration. A step-wise pseudo …
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Liquid-Liquid Extraction in Agitated Contactors Involving Droplet Coalescence and Redispersion
… and mass transfer. Cyclic phase inversion, a pseudo-steady state condition, under which stable operation is possible under high dispersed phase loading, was investigated. A design equation has been developed to predict mean drop sizes in the contactor in terms of column geometry, system …
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Retention of fermentation biomass for extended L-Lysine fermentations
… cross-flow microfiltration. A constant term (the pseudo steady state flux) has been included to provide a semi-empirical correlation of the cross flow filtration flux. The pseudo steady state flux is based on Darcy's law and a combination of the shear induced diffusion and surface transport …
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Numerical modeling of cold flow and hot gas desulfurization in a circulating fluidized bed
… and the second one assumes a turbulent core with pseudo-steady state boundary condition at the wall. A comparison is made with experimental results.
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Dynamic simulation of chemical plant
… modularisation. During the FIRST ROUND, STATE-VARIABLES are retrieved from the integrator and local calculations performed. During the SECOND ROUND, fresh derivatives are estimated and stored for simultaneous integration. ACES further includes a version of DIFSUB, a variable-step …
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Oxidative damage to recombinant proteins during production
… detoxification of reactive oxygen species. Under pseudo steady-state conditions, the fractional oxidation is near zero under anaerobic conditions and increases through the microaerobic regime. At dissolved oxygen concentrations greater than 10% of air saturation, the fractional oxidation did not …
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Linking cleaning performance to fluid flow via model soils
… the species transport model to simulate the pseudo-steady-state behaviour of the transient process, rather than employing conventional multiphase flow simulations. Previous work using this approach, which relied on experimentally fitted model parameters, showed reasonable agreement in some …
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Gaseous diffusion in liquids
… a means of interpreting structure in the liquid state. Structural models of the liquid state include Hildebrand's condensed gas model and Eyring's pseudo-lattice model. The former model predicts a linear dependence of diffusivity with temperature while the latter model predicts linear dependence …
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Thermodynamics and kinetics of hydrophobic organic compound sorption in natural sorbents and quantification of black carbon by electron microscopy
… predictions can be obtained when assuming pseudo steady state conditions, but not equilibrium partitioning, for the bed sediment and the water column. Furthermore, model results and literature evidence suggested that sediment resuspension may be a significant mobilization mechanism for …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… fed medium containing PCE showed that pseudo-steady-state mRNA levels were achieved and that increases in PCE loading rate led to corresponding increases in chloroethene respiration rate. Regulation of steady-state transcript levels of most bioindicators was sensitive to chloroethene …
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Laser induced fractures in porous media.
… flow and a reasonable improvement during pseudo steady state flow (approx. 2–3 Fold of Increase, FOI). The range of flow improvement indicated in this research is encouraging and equivalent to the potential improvement that could be achieved - up to a certain degree - by conventional …
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Revised productivity index equation to improve transient history match for the Capacitance Resistance Model
… waterflooding the dominant flow regime is semi-steady state. However, to extend the functionality of this model to unconventional reservoirs, a productivity index model that works well in transient flow regime should be investigated. In this thesis, two different productivity models are …
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A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor
… with respect to aspect ratio was conducted. Pseudo-steady state kinetics was assessed based on carbon source utilisation, volumetric sulphate reduction, sulphide removal efficiency and elemental sulphur recovery. Additionally, the hybrid LFCR provided a unique synergistic environment for …