E. Tejaswini , B. Sreenivasulu , B. Srinivas ,
Gayatri Vidya Parishad College of Engineering, Visakhapatnam, Andhra Pradesh, India
In this work, the heat transfer characteristics of two heated cylinders of square cross-section immersed in a streaming Bingham plastic medium have been studied. The governing differential equations (continuity, momentum and thermal energy) have been solved numerically over wide range of conditions as: plastic Reynolds number, 0.1 ≤ Re ≤ 40, Prandtl number, 1 ≤ Pr ≤ 100, Bingham number, 0 ≤ Bn ≤ ...
S. Bekemeier, L. Fromme, A. Genschel, K. Kröger
University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Bielefeld, Germany
Adequate cooling of beverages is a major issue in planning of several types of events, e.g. poster sessions at conferences. One crucial factor is the time needed to cool beverages from its initial temperature to the desired drinking temperature. We present a way to determine a close approximation for the cooling behavior of three types of commonly used beverage containers using COMSOL ...
G. Perillo, A. Monetti, A. Troiano, M. G. Di Giuseppe, C. Troise, G. De Natale
University of Naples Parthenope, Naples, Italy
INGV-Osservatorio Vesuviano, Naples, Italy
Geothermal systems represent a large resource that can provide, with a reasonable investment, a very high and cost-effective power generating capacity. Despite its unquestionable potential, geothermal exploitation has long been perceived as limited, mainly because of the dependence from strict site-related conditions, mainly related to the reservoir rock’s permeability. In this work, SP ...
R. Busqué , R. Torres , A. Husar , J. Grau 
 Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Barcelona, Spain
 Institut de Robòtica i Informàtica Industrial CSIC-UPC, Barcelona, Spain
The storage of hydrogen as an absorbed element in metal hydride bottles is a promising technique for energy storage. In this work, a three-dimensional model of a charging process in a metal hydride container has been developed to simulate the absorption reaction and resultant heat and mass transport phenomena in metal hydride vessels. The model has been experimentally validated showing a good ...
M. M. Pariona , F. de Oliveira ,
 State University of Ponta Grossa, PR, Brazil
INTRODUCTION The purpose of this work is to verify the effect of Multigrid method on the CPU time for the resolution of the heat transfer model, based on the Finite Element Method (FEM), in order to simulate the laser surface remelting (LSR) of the Al–1.5 wt.% Fe alloy. To accelerate the convergence of Single grid methods, Multigrid method (MG) was employed in order to reduce the CPU time. In ...
B.W. Reed, T.B. LaGrange, G.H. Campbell, and N.D. Browning[1,2]
Lawrence Livermore National Laboratory, Livermore, CA, USA
University of California Davis, Davis, CA, USA
The Dynamic Transmission Electron Microscope (DTEM) at Lawrence Livermore National Laboratory is a unique instrument able to capture images of fast-evolving microstructure with exposure times of only 15 ns. This is more than six orders of magnitude faster than conventional in situ electron microscopy and has enabled new insights into phase transformations, chemical reactions, and materials ...
D. Testi, P. Conti
University of Pisa, Department of Energy and Systems Engineering, Pisa, Italy
The use of foundation piles as ground heat exchangers coupled to a geothermal heat pump is considered of interest for possible savings in installation costs, compared to conventional borehole heat exchangers. We refer to them as “geothermal piles” or “energy piles”. The main purpose of the foundation structure is to transmit the load of the building to the lower layers of the soil, best suited ...
L. Graber, N.G. Suttell, D. Shah, D.G. Crook, C.H. Kim, J. Ordonez, S. Pamidi
Center for Advanced Power Systems, Florida State University, Tallahassee, FL, USA
Heat sinks for cryogenic applications using helium gas as the coolant are not readily available. They require to be designed specifically for the intended application. A finite element model was developed to study the feasibility and optimize the design. The FEM computing package COMSOL Multiphysics allowed to couple fluid flow and heat transfer as needed. An experiment was designed to validate ...
K.Revathy, S. Agarwal, B. Muralidharan, G. Padmakumar, K. K. Rajan
Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
Electro refining is one of the important step in the Pyro processing nuclear spent fuel with molten salt. The electro refiner is a process vessel consists of anode ,cathodes and stirrers and ultra –high pure argon gas is provided at the top for inert atmosphere and at the bottom a cadmium layer is provided. The vapor pressure of the cadmium is high at the operating temperature, the cadmium vapor ...
G. Salazar Duarte, B. Schürer, C. Voss, D. Bathen
Linde AG, Munich, Germany
Universität Duisburg-Essen, Duisburg, Germany
Pressure Swing Adsorption (PSA) and Temperature Swing Adsorption (TSA) are commonly used for separation/purification of gas mixtures in industrial processes. The cycle time of industrial TSA processes usually ranges from several hours to days. The reason for this long cycle time is the usage of purge gas for heating and cooling the system (direct heating), which limits the application of TSA ...