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Showing 1 to 20 of 32 for “"mass transfer processes"”.
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Multiscale Modeling and Uncertainty Quantification of Multiphase Flow and Mass Transfer Processes
Most engineering systems have some degree of uncertainty in their input and operating parameters. The interaction of these parameters leads to the uncertain nature of the system performance and outputs. In order to quantify this uncertainty in a computational model, it is necessary to include the …
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Experimental analysis and modeling of transient dissolution of RDX through mass transfer processes
… degradation, mobile-immobile sorption, and a mass transfer source term. Numerical code was developed and this model simulated the following: (1) flow rate, (2) initial mass loading, (3) particle size and (4) field oil. The simulation model results verified laboratory experiments provided by …
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A three-dimensional two-phase model for flow, transport and mass transfer processes in sewers
… approaches. At the same time, some predominant processes, e.g. the flow velocities in the air phase, are three-dimensional, and H2S emissions are very relevant on locations with high turbulence and complex flow fields (e.g. drops). This work continues at this point. It investigates and extends a …
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Dynamic and Static CO2 Mass Transfer Processes in Bulk Heavy Oil and Heavy Oil Saturated Porous Media
… enhanced oil recovery method is the mass transfer from the solvent to the oil phase. Hence, it is essential to have deep knowledge about the interactions and mass transfers that occur between the solvents and oil in the solvent-EOR processes. The primary objective of this research is …
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Heat and Mass Transfer in Reactor Core During a Loca-Single Channel Analysis (Mixed Convection, Numerical, Flow, Thermal-Hydraulics)
… release, a detailed study of the heat and mass transfer processes during LOCA was made.
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Mass Transfer Studies In A 'Finpak' Distillation Column
… contacting device for the investigation of mass transfer processes inhere low liquid rates are employed, such as in vacuum distillation.<br/><br/>With regards to the vacuum distillation process it was shown that column efficiency improved on reducing stillhead pressure, and it is proposed …
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Modelling simultaneous heat and mass transfer in wood
… fundamental and quantitative study of heat and mass transfer processes in wood plays an important role for understanding many important production processes, such as wood drying and hot-pressing. It will help us improve the existing products and production techniques and develop new …
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Modeling the Dissolution of Immiscible Contaminants in Groundwater for Decision Support
… historical monitoring of contaminant mass discharge, and the mathematical simulation of field-scale mass transfer processes. Effective methods for simulating NAPL dissolution must therefore be able to assimilate a variety of data through physical and scalable mass transfer parameters …
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Numerical simulation of mixing processes in two-dimensional channel flows
… is needed to improve predictions of heat and mass transfer processes in a variety of technical fields.</p> <p>In this work a new computationally efficient transport model is developed. It consists of partially parabolized time-dependent equations of motion, continuity, and concentration of …
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Power dissipation and power correlations for a retreatblade impeller under different baffling conditions
… is a critical process parameter to mixing processes to achieve the desired mixing effect, especially since the power per unit volume, P/V, directly controls mass transfer processes and other mixing phenomena. However, little information has been published about the power dissipation and the …
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Modelling the microclimate in a conical bottomed circular grain silo
… are used to compute the simultaneous heat and mass transfer processes that occur in non-aerated and aerated grain silos. The conservation equations of momentum, mass and energy are employed in this study. The numerical scheme is based on applying a mapping technique with an algebraic grid …
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Mechanistic Simulation of Solvent-aided Gravity Drainage of Bitumen
… defined to enable the numerical model for pure mass and heat transfer as well as coupled heat and mass transfer processes. Three mechanistic cases were studied including isothermal gravity drainage, non-isothermal gravity drainage, and solvent-aided non-isothermal gravity drainage. Also, three …
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A fluidized immunoadsorption device for removing beta-2-microglobulin from whole blood : a potential treatment for dialysis-related amyloidosis
… particles (100 m) that possess inherent mass-transfer advantages over the larger ones (>400 gIm) that are required for safe contact with whole blood for this application. Demonstrating the efficacy of this technology as a therapy for DRA would support its tailored application for treating …
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Study of building material emissions and indoor air quality
… to porous substrates. This model considers VOC mass transfer processes in the air, material-air interface, material film, and the substrate. The model can predict "wet" material emissions under different environmental conditions (i.e., temperature, velocity, turbulence, and VOC concentration in …
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Heat and mass transfer in bubble column dehumidifiers for HDH desalination
Heat and mass transfer processes governing the performance of bubble dehumidifier trays are studied in order to develop a predictive model and design rules for efficient and economical design of bubble column dehumidifiers for humidification-dehumidification (HDH) systems. As a result of their high …
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Influence of Soil Moisture Dynamics on DNAPL Spill Zone Architecture and Its Impact on Mass Removal Mechanisms During Soil Vapor Extraction in Heterogeneous Porous Media
… zone architecture) determines the pore-scale processes that control soil vapor extraction (SVE). To test this hypothesis, a fully coupled multiphase flow and transport simulator, STOMP was chosen. STOMP was first used to develop a new conceptual model for the migration and distribution of …
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Monitoring of Biodiesel Transesterification Process Using Impedance Measurement
… has two significant mechanisms, and exhibits a mass transfer controlled region that precedes a second order kinetically controlled region. In order to control the conversion process it is useful to employ process monitoring. In particular monitoring of the mass transfer processes that limits the …
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Characterising Adsorption and Mass Transfer in Porous Media
… and characterise competitive adsorption and mass transfer processes in porous materials. This has primarily involved investigations on porous oxides; in particular silicas and aluminas commonly used as catalyst supports. The techniques used are demonstrated to be capable of acquiring …
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Quantification of Parameters in Models for Contaminant Dissolution and Desorption in Groundwater
… most significant challenges faced when modeling mass transfer from contaminant source zones is uncertainty regarding parameter estimates. These rate parameters are of particular importance because they control the connectivity between a simulated contaminant source zone and the aqueous phase. …
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