Thermal and Electrostatic Analyses of One Dimensional CFC Diagnostic Calorimeter for SPIDER Beam Characterisation
M. De Muri, M. Dalla Palma, P. Veltri, A. Rizzolo, N. Pomaro, and G. Serianni
Consorzio RFX, Euratom-ENEA Association, Padova, Italy
Dipartimento di Ingegneria Elettrica, Padova University, Padova, Italy
The main purpose of SPIDER (Source for the Production of Ions of Deuterium Extracted from RF plasma) test facility is the investigation and optimization of a negative ion beam produced by the full size ion source for ITER NBIs (Neutral Beam Injectors). Thermal, transient, non-linear FE (Finite Element) analyses and also electrostatic analysis have been performed as a feasibility study, to ...
COMSOL Multiphysics® as a Tool to Increase Safety in the Handling of Acetylene Cylinders Involved in Fires
F. Ferrero, M. Beckmann-Kluge, and K. Holtappels
BAM Federal Institute for Materials Research and Testing Division II.1 “Gases, Gas Plants”, Berlin, Germany
In this paper a mathematical model for predicting the heating-up of an acetylene cylinder involved in a fire is presented. In the simulations polynomial functions were used to describe the temperature dependency of the thermal properties of the cylinder interior, which is a complex system composed by a solid porous material, a solvent and acetylene dissolved in it. Model equations covered heat ...
J. Acuna and B. Palm
Department of Energy Technology, KTH, Stockholm, Sweden
The most common way to exchange heat with the bedrock in Ground Source Heat Pump (GSHP) applications is circulating a fluid through a U-formed closed loop in vertical boreholes drilled several tenths of meters into the ground. This study presents and compares the results of eight cross sectional U-pipe Borehole Heat Exchanger configurations. Values from recent experimental temperature ...
M.J. Jakubinek[1,2], C.A. Whitman[2,3], and M.A. White[1,2,3]
Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
Institute for Research in Materials, Dalhousie University, Halifax, Nova Scotia, Canada
Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
There is considerable interest in the possibility of combining NTE materials with normal (positive) thermal expansion materials, to reduce the potential of failure of a material or component due to thermal stress fracture. Finite element analysis (FEM) is used to explore the overall expansion and thermal stress in composites.
A. Talic, S. Cerimovic, F. Kohl, R. Beigelbeck, F. Keplinger, and J. Schalko[1,2]
Research Unit for Integrated Sensor Systems, Austrian Academy of Sciences, Wr. Neustadt, Austria
Institute of Sensor and Actuator Systems, Vienna University of Technology, Vienna, Austria
In this work, we present simulations of a novel micromachined calorimetric flow sensor using COMSOL Multiphysics. The sensor is based on four germanium thermistors that serve as heat sources and as temperature sensors simultaneously. In operational mode, the heated membrane is cooled by any passing flow and the local cooling rate depends on the flow velocity. The simulation results demonstrate ...
S. Bellur, B. Agasanpura, and C. Coronella
Chemical and Metallurgical Engineering Department, University of Nevada, Reno, Nevada, USA
The aim of the present work is the formulation of a computational model describing transport phenomena in transient biosolids drying. COMSOL Multiphysics was used to perform the simulations, with two spatial dimensions. After a time step of 0.1 s, we found that the solid reached thermal equilibrium with the surrounding gas, which is consistent with empirical correlations.
Modeling of the Bread Baking Process Using Moving Boundary and Arbitrary-Lagrangian-Eulerian (ALE) Approaches
C. Anandharamakrishnan, N. Chhanwal, P. Karthik, D. Indrani, and K.S.M.S. Raghavarao
Central Food Technological Research Institute, Mysore, Karnataka, India
Bread baking is a complex process where various physiochemical and biological transformations take place simultaneously. A two dimensional model was developed for the bread baking process taking into account of volume expansion, heat and mass transfer processes. Phase change and evaporation-condensation mechanism were incorporated by defining thermo-physical properties of bread as a function of ...
P. Goyal, V. Verma, R.K. Singh, and K.K. Vaze
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
High level radioactive waste (HLW) generated by nuclear fuel cycle is immobilized using glass melters. In Glass melters such as Joule Heated Ceramic Melter (JHCM) electrodes immersed in the glass generates heat by the joule heating due to electric current passing between electrodes through glass. For melter performance it is required to evlaute temperature distribution in the melter. Thermal ...
SORIN Group, France
In all implantable medical devices, one main challenge is to assure no water penetrates in the electronic part of the system. To be able to transmit the electronic information from the inside of the device to the lead without any water infiltration, we used a complex part called feed through. This piece is made of four different materials: titanium, alumina, gold and platinum. It is ...
Homogeneous and Inhomogeneous Model for Flow and Heat Transfer in Porous Materials as High Temperature Solar Air Receivers
O. Smirnova, T. Fend, P. Schwaryboezl, and D. Schoellgen
German Aerospace Center, Institute of Technical Thermodynamics, Koeln, Germany
Results of simulations on flow and heat transfer in a porous Silicon Carbide honeycomb structure applied as a solar air receiver are presented. In this application porous materials are put in concentrated solar radiation. Flux densities of up to 1000 MW/m² are reached. Simultanously, ambient air flows through the material to be heated up to temperatures of app. 800°C. This hot air is then used ...