G. Petrone, G. Cammarata, S. Caggia, and M. Anastasi
Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy
Engineering Maintenance - ISAB Energy Services, Priolo Gargallo, Italy
In this study, COMSOL Multiphysics is applied in order to simulate reacting flows for duct burner systems arranged in the post-firing section of a Heat Recovery Steam Generator of a combined cycle power plant. Two- and three-dimensional simulations are carried out in order to investigate on operative conditions mainly responsible of duct burners overheating. The results are obtained for several ...
J. Ebert, S. Ghosal, A. Emami-Naeini
SC Solutions, Sunnyvale, CA, USA
This paper describes the development of a COMSOL model of Electro-Chemical-Mechanical Planarization (ECMP) that was validated with experimental data. ECMP is used for processing of semiconductor wafers. We developed a 2D model of flow of phosphoric acid solution (the electrolyte) between two parallel plates that focuses on the physics and electrochemistry in ECMP. The model includes steady-state ...
Coupled Palaehydrogeological Microbial and Geochemical Reactive Transport Model of the Olkiluoto Site (Finland)
P. Trinchero, M. Luna, J. Molinero, G. Román-Ross, F. Maia, A. Nardi, J. Löfman, P. Pitkänen, L. Koskinen
Amphos 21 Consulting, Barcelona, Spain
VTT Energy, Finland
Posiva Oy, Olkiluoto, Finland
Olkiluoto at Eurajoki has been selected as the final repository site for spent nuclear waste in Finland. This area has been affected, at regional scale, by land-uplift processes related to the ice withdrawal. These events have resulted in a complex and stratified heterogeneous hydrochemical system. The objective of this work was to develop a robust paleohydrogeological reactive transport (PRT) ...
E. Salomatova, D. Trushnikov, V. Belenkiy, V. Tsaplin
Perm National Research Polytechnic University, Perm, Russia
In this paper describes an original method for indirect measurement of the vapor pressure and temperature in the keyhole in electron beam welding. This method is based on the determination of the concentration of chemical elements in the vapor above the welding zone. Taking into account these data model is built 2D diffusion processes with heat and mass transfer elements in the melt, which ...
M. Brundu, V. Guida
Procter & Gamble Italia, Pomezia, Roma, Italy
The challenge with the use of Sodium Carbonate Peroxyhydrate (Na2CO3*1.5H2O2) as a bleach source in dry detergent formulations is its lower stability in comparison with other materials, and the risk of quality losses of the product over the shelf life. The issue can be solved with the understanding and modeling of the decomposition mechanism of the powder. It is well known that the decomposition ...
J. Podichetty Thribhuvan, S.V. Madihally
Oklahoma State University, Stillwater, OK, USA
Utilization of bioreactors to regenerate tissues outside the body has been intensely investigated in functional tissue engineering. Various studies have been performed using computational fluid dynamics (CFD) to understand fluid flow within bioreactors while assuming porous scaffold as a rigid structure. However, the physical and mechanical properties of most tissue engineering scaffolds suggest ...
CNR-ITAE, Institute of Advanced Technologies for Energy, Messina, Italy
A biogas steam reforming reactor has been developed in order to be integrated into a proof-of-concept SOFC system, able to operate with biogas produced in an industrial waste water treatment unit. A mathematical model, aimed at describing the performance of the reactor, has been developed. The reactor is simplified and modeled as a non-isothermal plug flow reactor. The reactor is fed with a total ...
A. Fayolas , M.G. Sanku, M. Pascoa, M. Xynou
KTH Royal Institute of Technology, Stockholm, Sweden
The objective of the study is to investigate the chiral separation of Tröger’s base enantiomers using batch chromatography. Because of its resolution, chromatography is often the preferred method for chiral separations. The separation of Tröger’s base is resolved by using the COMSOL Multiphysics® software. It is modeled by one dimension geometry, having the length of the column set and ...
M. Hackert-Oschätzchen, M. Penzel, P. Plänitz, A. Schubert
Chemnitz University of Technology, Chemnitz, Germany
GWT-TUD, Dresden, Germany
Fraunhofer Institute for Machine Tools and Forming Technology IWU, Chemnitz, Germany
Gallium nitride (GaN) and its related nitride alloys with special physical properties are in technical areas of high interest. The growing of gallium nitride boules on non-native sapphire or silicon carbide requires complicated mechanisms of defect reduction in the lattice structure. Thus the production of gallium nitride substrates is a challenge. Hydride Vapor Phase Epitaxy (HVPE) is a ...
C. Wylock, A. Rednikov, B. Haut, P. Colinet
Université Libre de Bruxelles (ULB), Transfers, Interfaces and Processes (TIPs), Brussels, Belgium
This work deals with the modeling and the numerical simulation of the CO2 absorption, coupled with a chemical reaction, in an initially quiescent aqueous solution of sodium carbonate (Na2CO3) and bicarbonate (NaHCO3), inside a Hele-Shaw cell. In our Hele-Shaw cell, the liquid fills partially the gap between two parallel transparent Plexiglas plates. CO2 is forced to flow above the liquid in the ...