R. Spina, M. Spekowius, C. Hopmann
Dept. of Mechanics, Mathematics and Management (DMMM), Politecnico di Bari, Bari, Italy.
Institute of Plastics Processing (IKV), RWTH Aachen, Aachen, Germany.
The manufacturing of high quality injection molded parts requires a deep understanding of material properties, process parameters and product design. The behavior of a polymer during the injection molding process and the performance of the final part are strongly determined by the material structure formed during filling and cooling. The main objective of the presented work is to describe the ...
E. Holzbecher, H. Räuschel
Georg-August Universität Göttingen, Göttingen, Germany
Borehole heat exchangers (BHE) in connection with heat pumps and floor heating in many countries are becoming an alternative to conventional heating or cooling systems using fossil resources. We describe how 1D components for heat transport in pipes can be coupled with a 2D or 3D component for the ground. Thermal conductances are derived for laminar, transitory and turbulent flow conditions in ...
J.G. Pieters, R. ElGamal, F. Ronsse
Faculty of Bioscience Engineering, Department of Biosystems Engineering, Ghent, Belgium
CFD simulations were carried out to predict the convective heat and mass transfer coefficients in the rice bed, and correlations were developed for the convective heat and mass transfer coefficients as a function of drying air flow rate. The developed correlations were used to extend the model developed by ElGamal et al. (2013) for thin-layer rice drying to volumetric heat and mass transfer in a ...
Fully Coupled Thermo-Hydro-Mechanical Modeling by COMSOL Multiphysics, with Applications in Reservoir Geomechanical Characterization
T. Freeman, R. Chalaturnyk, and I. Bogdanov
University of Alberta, Edmonton, AB, Canada
Centre Huile Lourde Ouvert et Expérimental (CHLOE), France
Because of the complex nature of geomaterials and presence of solid and fluid within a single system, it is crucial to consider all the physics involved within the geomaterial system. A fully coupled thermo-hydromechanical model is developed. The model consists of a three-phase flow model designed as a set of coupled PDE application modes that when coupled with the Heat Transfer Module and ...
M.W. Siebert, and P.S. Fodor
Physics Department, Cleveland State University, Cleveland, Ohio, USA
In this work, the fluid flow over a 2D backward-facing step is analyzed in order to provide a case study for the use of different models for the blood dynamic viscosity in COMSOL Multiphysics. Three non-Newtonian models, as well as the Newtonian model are used to study the shear stresses and the reattachment length as a function of the fluid speed. The non-Newtonian models used in this study are ...
K. Weisbrod, R. Roberts, R. Chamberlin, S. Yarbro
Los Alamos National Lab, Los Alamos, NM, USA
Multiphase flow in a microreactor was studied numerically for two immiscible liquids. Validation of the model was sought by simulating the flow behavior and mass transfer characteristics of a neutralization reaction described in the literature. Contact angles, interfacial tension and the pressure field defined the interfacial boundary configuration. After first performing simulations to capture ...
COMSOL Multiphysics® Simulation of 3D Single-Phase Transport in a Random Packed Bed of Spheres - new
Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
Packed beds are important in the chemical industries. Computational fluid dynamics (CFD) can simulate detailed flow and scalar transport in packed beds for improved understanding and quantitative information. We present simulations of single-phase gas flow, conjugate heat transfer and isothermal dispersion of mass in a 3D model of a randomly-packed bed (tube-to-particle diameter ratio = 5.96) of ...
C. Falco, A. De Luca, S. Sarfraz, F. Udrea
University of Cambridge, Cambridge, UK
The aim of this work is to present a model capable to describe the behaviour of a thermal flow sensor under every physical aspect. A generic thermal flow sensor relates the flow properties with a variation in the temperature profile inside the device itself. Thus, it is locally heated up with a resistive element biased with an external current, surrounded by one or more temperature sensing ...
University of Hartford, Bloomfield, CT, USA
The analysis of an impinging jet in a cross-flow and the resulting vortical structures are presented. A computational fluid dynamics simulation utilizing the k-ε model for turbulence is validated in COMSOL Multiphysics® by comparing the results to previous experimental and theoretical studies conducted in air. The model was then altered utilizing the hydraulic analogy for an experiment ...
A. Noume, C. Vasile, M. Risser
National Institute of Applied Science (INSA), Strasbourg, France
In automotive industry, regardless the type of engine we use, heating and air-conditioning is responsible for the highest energy consumption among all the auxiliary systems all over the year. For conventional vehicles with thermal engines, the heating of the internal space is easy obtainable because of the heat waste from the engine. For the electric vehicles, as the energy is delivered by the ...