R.E. Tosh, and H.H. Chen-Mayer
National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Primary reference standards for determining absorbed dose to water in radiotherapy beams used at cancer clinics and hospitals ultimately must make reference to the temperature change in water produced by ionizing radiation. The most direct experimental technique for this purpose is water calorimetry. Since the dose distributions delivered by such beams are nonuniform, temperature signals ...
H. Ishimori, K. Endo, and M. Yamada
National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
In this study, COMSOL Multiphysics was used for the reliability evaluation for static chamber method at landfill sites. Static chamber method, which measures landfill gas emission fluxes, is widely used at landfill sites for the monitoring of greenhouse gas emission such as methane and carbon dioxide. The accuracy and the reliability of static chamber method are dependent on the measuring ...
Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA
Heat conduction through a slab, 0 ≤ x ≤ W is one dimensional. However, if one of the edges, say x=0, is rough the conduction will be two dimensional. The two dimensionality varies with the correlation length with a maximum at a length approximately 10% of the slab width. The maximum percentage standard deviation of the flux is of the order of 3 time that of the roughness. Monte ...
Simulation of the Convective Heat Transfer and Working Temperature Field of a Photovoltaic Module Using COMSOL Multiphysics®
E. Ruiz-Reina and M. Sidrach-de-Cardona
Departamento de Física Aplicada II, Universidad de Málaga, Málaga, Spain
The aim of this work is the Finite Element Analysis (FEA), by using COMSOL Multiphysics®, of the convective heat transfer and working temperature field of a photovoltaic module under different wind conditions.
D. Groulx, and W. Ogoh
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 ...
G. Jovonavic, J. Jones, and A. Yokochi
School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA
This paper describes the benefits of computational fluid dynamics in the development of a microreactor used in the desulfurization of aromatic compounds. It is crucial to verify diffusion and extinction coefficients to ensure accurate simulation results prior to experiments. COMSOL Multiphysics was used to model the behavior of all of the possible species present and reactions that may occur.
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 ...
G. Debenest, and M. Quintard
Institut de Mécanique des Fluides de Toulouse
Flows in highly heterogeneous media are found in many practical fields, such as hydrology, petroleum engineering, and chemical engineering. The case of two-region heterogeneous media (fractured media, catalytic beds, etc.) plays a fundamental role. The different questions associated to this specific case are illustrated in this paper for two different kinds of transport: (i) flow of a slightly ...
Numerical Simulation of Moving Boundary Problems with the ALE Method: Validation in the Case of a Free Surface and a Moving Solidification Front
Université de Bretagne Sud
This work investigates numerical simulations of problems involving moving boundaries. The first case concerns the simulation of incompressible Newtonian fluid flow problems with free surfaces in the presence of surface tension (the sloshing problem). The second case deals with a problem of heat transfer in the presence of an advancing solidification front (the Stefan problem).
Modeling the Coupled Mass Transfer Phenomena During Osmotic Dehydration of Fresh and Frozen Mango Tissues
J. Floury, Q.T. Pham, and A. Le Bail
 UMR STLO–INRA–Agrocampus
 School of Chemical Engineering and Industrial Chemistry, UNSW
 UMR CNRS GEPEA–ENITIAA, Nantes
In this paper, we present a mathematical model for simulating the mass transfer, during the osmotic dehydration of mango cubes. The mass balance equation for the transport of each constituent is established separately for intracellular and extracellular volumes but accounts for the mass exchange across the cell membrane and the shrinkage of whole tissue.