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Food Cooking Process. Numerical Simulation of the Transport Phenomena

B. Bisceglia[1], A. Brasiello[1], R. Pappacena[1], R. Vietri[1]
[1]University of Salerno, Department of Industrial Engineering, Fisciano (SA), Italy

Aim of the study is to determine the influence of some of the most important operating variables, especially humidity and temperature, of drying air on the performance of cooking process of pork meat. The process is simulated using finite elements software COMSOL Multiphysics®. The proposed model considers two geometries: cylindrical and parallelepiped, with fixed physical properties and ...

Ammonia Removal From Water by a Liquid-Liquid Membrane Contactor Under a Closed Loop Regime

E. Licon[1], S. Casas[1], A. Alcaraz[1], J.L. Cortina[1], C. Valderrama[1]
[1]Universitat Politécnica de Catalunya, Barcelona, Spain

Ammonia separation from water by membrane contactor was simulated on transient state and compared with experimental data. Aqueous low concentrated solution of ammonium with high pH has been pumped inside the hydrophobic hollow fibers, acid solution in the outside part. The system is in closed loop configuration. In order to simulate the separation process, equations were developed considering ...

Modeling of Packed Bed Reactors: Hydrogen Production by the Steam Reforming of Methane and Glycerol - new

A. Dixon[1], B. MacDonald[1], A. Olm[1]
[1]Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA

The conventional route to hydrogen production is by steam reforming of methane (MSR) in a multitubular packed bed. With the increasing use of biodiesel as a renewable fuel, interest has grown in steam reforming of the excess glycerol produced as a side product (GSR). We use COMSOL Multiphysics® software to model a tubular packed bed reactor, solving a single pellet model at each point. The ...

Modeling of Transport Phenomena in Gas Tungsten Arc Welding of Ni to 304 Stainless Steel

A. Bahrami[1], D. K. Aidun[1]
[1]MAE Department, Clarkson University, Potsdam, NY, USA

COMSOL Multiphysics® is used to simulate the transport phenomena in arc welding of Nickel to 304SS. Electric Currents (ec) and Magnetic Fields (mf) are used to solve for the Lorentz force which is one of the volume forces. Laminar Flow (spf) is used to simulate flow field. The Lorentz and buoyancy forces are applied as volume forces to the fluid domain. Marangoni effect also is applied to the ...

Claus Process Reactor Simulation

J. Plawsky[1],
[1]Rensselaer Polytechnic Institute, Troy, NY, USA

A model was developed to simulate the reaction, concentration field, flow field, and temperature distribution inside a Claus reactor for converting hydrogen sulfide to sulfur. The model considered two ideal reactors, a continuous stirred tank reactor and a plug flow reactor. As expected, two ideal reactors showed much different behaviors in terms of reactant conversion and operating ...

Solid-Liquid Phase Change Simulation Applied to a Cylindrical Latent Heat Energy Storage System

D. Groulx[1], and W. Ogoh[1]

[1]Mechanical Engineering Department, Dalhousie University, Halifax, Nova Scotia, Canada

One way of storing thermal energy is through the use of latent heat energy storage systems. One such system, composed of a cylindrical container filled with paraffin wax, through which a copper pipe carrying hot water is inserted, is presented in this paper. It is shown that the physical processes encountered in the flow of water, the heat transfer by conduction and convection, and the phase ...

Simulation of Geomechanical Reservoir Behavior during SAGD Process Using COMSOL Multiphysics®

X. Gong[1], R. Wan[1]
[1]University of Calgary, Calgary, AB, Canada

THM (Thermo-Hydro-Mechanical) behavior of the reservoir during SAGD (Steam-Assistant-Gravity-Drainage) was studied through a proper constitutive modeling of the porous media. Specifically, a generalized density-stress-fabric dependent elasto-plastic model with stress-dilatancy and plastic damage as main ingredients was implemented into COMSOL Multiphysics®, to model geomechanical behavior during ...

Modelling of Heat and Mass Transfer in Food Products

[1]M.B. Andreasen

[1]Danish Technological Institute, Aarhus C, Denmark

The use of the finite element method for understanding and analyzing the freezing and drying processes of food products is in focus in this paper. The objective of this study is to develop a model that can predict temperature distribution and weight loss of food products during the freezing and drying processes. The problem was solved by utilizing heat, mass transfer and moving mesh model. In ...

Entropic Evaluation of Dean Flow Micromixers

P. S. Fodor[1], M. Kaufman[1]
[1]Cleveland State University, Cleveland, OH, USA

In this work we investigate computationally the use of spiral channels at Reynolds numbers from 25 to 900 as a mixing structure (Figure 1) using COMSOL Multiphysics, the CFD Module, and the Chemical Species Transport physics. In this system, the centrifugal forces experienced by the fluid as it travels along the curved trajectory induce counter-rotating flows. The presence of these transversal ...

Modeling of Residual Stresses in a Butt-welded Joint with Experimental Validation

V. Srivastava [1],
[1] Naval Materials Research Laboratory (NMRL), Defence Research and Development Organization (DRDO), Ambernath, Thane, Maharashtra, India

2D-modeling of arc welding in butt-joint configuration was performed in this study considering thermal-structural interactions. Thermal behavior was modeled in COMSOL Multiphysics® using the Heat Transfer Module with weld heat input as a Gaussian pulse whereas structural behavior using Structural Mechanics Module. Thermal-elastic-plastic behavior model based on Von Mises yield criteria and ...