C. Cecioni, and G. Bellotti
University of Roma TRE, DSIC, Rome, Italy
This paper presents a numerical model based on the mild-slope equation (MSE for short) solved using the PDE mode of the software COMSOL Multiphysics suitable to reproduce the propagation of small amplitude tsunamis in the off-shore field. The model solves the governing equations in the frequency domain and allows the reproduction of the frequency dispersion for broad banded spectrum sea states. ...
D. Baldissin and D. Lombardo
Compumat S.r.l., Torino, Italy
A two-dimensional mathematical model for the absorption and desorption of H2 in LaNi4.8Al0.2 was developed and experimentally validated. The model is composed of an energy balance, a mass balance and a momentum balance. These differential equations are numerically solved by means of the finite element method using the software COMSOL Multiphysics®. From a comparison between theoretical ...
Towards a Model for Simulating Driving Rain on an Inclined Roof during Wind Gusts and Heavy Rain Intensity
A.W.M. van Schijndel
Eindhoven University of Technology, Eindhoven, The Netherlands
The roof of a well known shopping place in Amsterdam collapsed during a storm with heavy rain showers in 2002. One of the main problems was the malfunction of the draining system. Another problem was that driving rain water apparently washed over edges that where designed to hold the water. This short paper presents the progress of using COMSOL to simulate the height of the water near the edges ...
Witz, G., Revaz, B., Flükiger, R.
Université de Genève, Gap-Supra 20, Genève, Suisse
The parameters describing the heat transfer between the plasma channel and the workpiece during the electron discharge machining (EDM) process are still poorly understood. Models describing this phenomenon have many lacunas and can not be used for relevant predictions. Using high resolution local temperature measurements and inverse calculations made with FEMLAB and MATLAB, we successfully ...
Mathematical Frame-work for the Productivity Index of Wells with Fast Forchheimer (non-Darcy) Flow in Porous Media
E. Aulisa , A. Ibragimov, P. Valko , and J. Walton
 Texas Tech University, Department of Mathematics and Statistics
 Texas A & M University, Department of Petroleum Engineering
 Texas A & M University, Department of Mathematics
In the current paper, similar features for fast or turbulent, non-linear flows subjected to Forchheimer equations are analyzed. Under some hydrodynamic and thermodynamic constrains, it has been shown that there exists the so called pseudo-steady state regime for Forchheimer flows in reservoir media. This invariant is called diffusive capacitance, which is the mathematical model for the well ...
Universität Louis Pasteur; Fluid Mechanik, Strassburg, France
Das breite Anwendungsspektrum von Bentonitsuspensionen ist auf ihre spezifischen Eigenschaften zurückzuführen, wie z.B. ihre plastischen Eigenschaften (Fließgrenze) und die Thixotropie (unvollkommene Thixotropie). Infolge ihrer Dichte und der Fliessgrenze sind Bentonitsuspensionen in der Lage, Erdwände zu stützen. Das Ziel dieser Arbeit ist, die Entwicklung der rheologischen Parameter ...
Error Analysis in Estimating Temperature-Dependent Thermal Diffusivity and Kinetic Parameters using Heat Penetration Data
K.D. Dolan[1,2], A.R. Sommerlot, and D.K. Mishra
Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan, USA
Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA
Growing consumer demand for nutraceuticals has stimulated interest by food companies to increase levels of these health-promoting compounds. Thermal processing of canned foods in a retort produces a unique problem: some of the nutraceuticals are highly sensitive to temperature, and require accurate parameter estimates to predict their fate during processing. Error in temperature measurement due ...
F. Van den Abeele, J. Vande Voorde, and P. Goes
ArcelorMittal Research & Development Industry Gent, Zelzate, Belgium
Vortex-induced vibration is a major cause of fatigue failure in submarine oil and gas pipelines and steel catenary risers. Even moderate currents can induce vortex shedding. In this paper, COMSOL Multiphysics is applied to study the flow pattern around submarine pipeline spans, and predict the amplitude and frequency of the vortex induced vibrations. The sensitivity of the computational fluid ...
Wall Effect on A Spherical Particle Settling along The Axis of Cylindrical Tubes Filled with Carreau Model Fluids
D. Song, R. Gupta, and R. Chhabra
Dept. of Chemical Engineering, West Virginia University, Morgantown, WV
Indian Institute of Technology, Kanpur, India
The effect of finite boundaries on the drag experienced by a rigid sphere settling along the axis of cylindrical tubes filled with Carreau model fluids has been examined systematically over a wide range of condition. As expected, the presence of finite boundaries leads to an increase in the drag force exerted on a falling sphere thereby retarding its descent due to the obstruction caused by ...
N. Elabbasi, X. Liu, S. Brown, M. Vidal, M. Pappalardo
Veryst Engineering LLC, Needham, MA, USA
Nordson EFD, East Providence, RI, USA
Laminar flow static mixers are accurate, inexpensive fluid mixing devices that can handle a wide range of fluids and mixing proportions. They have a wide range of industrial applications, especially in the consumer product, pharmaceutical, biomedical, and petrochemical industries. A good mixing quality is obtained when the outlet of the mixer has no concentrated volumes of either mixed materials ...