Finite Element Solution of Nonlinear Transient Rock Damage with Application in Geomechanics of Oil and Gas Reservoirs
S. Enayatpour, T. Patzek
The University of Texas at Austin, Austin, TX, USA
The increasing energy demand calls for advances in technology which translate into more accurate and complex simulations of physical problems. Understanding the rock damage is essential to understanding the geomechanics of hydrocarbon reservoirs. The fragile microstructure of some rocks makes it difficult to predict the propagation of fracture in these rocks, therefore a mathematical model is ...
S. Odiba, M. Olea, S. Hodgson, A. Adgar
Teesside University, School of Science and Engineering, Middlesbrough, United Kingdom
This research deals with the design of suitable microreactors for the catalytic oxidation of volatile organic compound (VOCs), using propane as a model molecule. The microreactor considered consists of eleven parallel channels, in which an Au/Cr/γ-Al2O3-catalyzed combustion reaction takes place. Each channel is 0.5 mm diameter and 100 mm long. The catalytic microreactor was simulated for ...
P. L. Mills, A. Nagaraj
Department of Chemical & Natural Gas Engineering, Texas A&M University, Kingsville, TX, USA
Department of Environmental Engineering, Texas A&M University, Kingsville, TX, USA
Introduction: Development of next-generation chemical processes that have zero emissions is a key environmental objective for sustainable development. The manufacture of H2SO4 by the air oxidation of SO2 to SO3 is an important technology where an opportunity exists for new catalyst development and process innovation by reducing emissions of unconverted SO2 in process reactor tail gases owing to ...
D. Dalle Nogare and P. Canu
Department of Chemical Engineering Principles and Practice, University of Padova, Padova, Italy
This work investigates the effects of boundary conditions on the species profiles in heterogeneous catalysis, with low Péclet systems. Hydrogen combustion in Helium was chosen because of the high diffusivities. Furthermore, already at T=300°C over a Pt catalyst, kinetics is very fast and the composition gradients at the inlet extremely steep. The issue is analyzed with 1D models, ...
S. Curcio and M. Aversa
Department of Engineering Modeling, University of Calabria, Arcavacata di Rende, CS, Italy
The aim of the present work is the formulation of a theoretical model describing the transport phenomena involved in food drying process. The attention has been focused on the simultaneous transfer of momentum, heat and mass occurring in a convective drier where hot dry air flows, in turbulent conditions, around the food sample. The proposed model does not rely on the specification of interfacial ...
The use of CFD Modeling to Determine the Influence of Residence Time Distribution on the Disinfection of Drinking Water in Ozone Contactors
J. Hofman1,2,3, D. Wind1, B. Wols3, W. Uijttewaal3, H. van Dijk3, and G. Stelling3
1Waternet, Amsterdam, The Netherlands
2Kiwa Water Research, Rijswijk, The Netherlands
3Delft University of Technology, Delft, The Netherlands
Disinfection is one of the most important aspects of drinking water treatment and is directly related to public health.Waternet uses ozone treatment as a main disinfection for drinking water production. Residence time distribution (RTD) in the ozone contactor has a large influence on the disinfection performance of the system. To get more insight into the effect of RTD, a multiphysics model was ...
G. Rádi, T. Varga, and T. Chován
University of Pannonia, Veszprem, Hungary
Nowadays mathematical models are applied in almost every field of our life to predict how real systems behave. Computational Fluid Dynamics (CFD) has become a standard tool for analyzing various situations where fluid flow has a significant effect on the studied processes. Complex models can be implemented and solved in commercial CFD packages (e.g. COMSOL Multiphysics). The goal of this paper is ...
C. Anandharamakrishnan, R. Gopirajah, and N. Chhanwal
Central Food Technological Research Institute
Freeze-drying is a popular method of producing shelf stable particulate products and is of particular value for drying thermally sensitive materials (volatiles and biological based), which can be heat damaged by higher temperature methods, such as spray-drying. Porous structures are formed by the creation of ice crystals during the freezing stage, which subsequently sublime during the drying ...
M. Chahardowli, R. Farajzadeh, J. Bruining
Department of Geotechnology, Delft University of Technology, Delft, The Netherlands
One of the main mechanisms in the secondary oil migration from the source rock into oil traps is gravity driven countercurrent imbibition. Many mathematical models describe countercurrent imbibition considering local equilibrium. However, Barenblatt proposed a model to describe the effect of non-equilibrium in oil water displacement. Here, the proposed model was implemented in a gravity driven ...
E. Holzbecher, S. Oehlmann
Georg-August Universität Göttingen, Göttingen, Germany
Phenomena of heat and mass transfer are often compared, in various porous media applications. Questions of practical interest are, for example, if tracers can be used for the prediction of heat flow, or vice versa if heat can be utilized as, possibly retarded, tracer for predicting the migration of contaminants, nutrients or other substances. Using numerical modelling in artificial porous media ...