M. Yang, A. Young, and B. Crittenden
Department of Chemical Engineering University of Bath, Bath, United Kingdom
A small batch stirred cell which is operated at temperatures up to 400 °C and pressures up to 30 bar is used to study fouling behaviors of selected crude oils. COMSOL Multiphysics package is used for the CFD (Computational Fluid Dynamics) and heat transfer modeling for this stirred cell system. The simulation results are validated against the measured temperature data at various axial ...
M. Al-Rawashdeh[1,2], V. Hessel[1,2], P. Löb, and F. Schönfeld
Institut für Mikrotechnik Mainz GmbH, Mainz, Germany
Department of Chemical Engineering and
Chemistry, Eindhoven University of Technology, Eindhoven, Netherlands
Gas-liquid falling film microreactors carry out fast exothermic and mass transfer limited reactions. Since the major rate limiting steps occur on the liquid side, it is important to account for a realistic liquid film profile within the reactor simulation. Based on realistic channel geometry and liquid menisci profiles, we describe the liquid film thicknesses, flow velocities, species transport ...
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 ...
S. Makridis, E.I. Gkanas, A. Ioannidou, E.S. Kikkinides, A.K. Stubos
Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece & Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece
Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
Environmental Research Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Athens, Greece
Hydrogen, the most abundant element in the universe, has great potential as an energy source, and can be generated from renewable energy sources. We used COMSOL for the solution of the energy, mass and momentum balance equations that describe the hydrogen absorption and desorption procedure in the metal hydride compressor. Thermodynamic or engineering properties like the reaction enthalpy ??, ...
M.K. Ghantasala, B.O. Asimba, A. Khaminwa, K.J. Suthar, D.C. Mancini
Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, MI, USA
Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
Physical Sciences and Engineering, Argonne National Laboratory, Argonne, IL, USA
The understanding of pH-sensitive hydrogel swelling response in different buffer environmental condition is essential for its use in different practical applications. This necessitates its simulation in steady state and transient conditions. This paper mainly deals with the details of the numerical simulation performed by developing coupled formulation of chemo-electro-mechanical behavior of ...
Simulation of Differential Ion Mobility (DMS) Principle Coupled with Mass Spectrometry in Atmospheric Pressure
F. Sinatra, T. Wu, A. Avila, E. Nazarov, T. Evans-Nguyen, J. Wang
Draper Laboratory, Tampa, FL, USA
University of South Florida, Tampa, FL, USA
Mass spectrometry is an analytical technique widely used in the scientific community to determine chemical composition of sample compounds. Typically, mass spectrometers perform their analysis under vacuum conditions, though atmospheric pressure mass spectrometers are becoming more prevalent. With the development of atmospheric pressure mass spectrometers, techniques such as FAIMS (Field ...
K.O. Lund, C.M. Lord
Kurt Lund Consulting, Del Mar, CA, USA
Lord Engineering Corp., Encinitas, CA, USA
Pressure-drop experiments were conducted for the turbulent, compressible flow of air in a small, slender tube, and modeled with COMSOL heat transfer module, and analytically. A scalar integration variable is introduced which integrates the mass velocity [kg/m²s] over the inlet area and iteratively equates this to the input mass flow [kg/s]. For computation, the temperature specification is ...
Finite Element Analysis of Induced Electroosmotic Flow in Brain Tissue and Application to ex vivo Determination of Enzyme Activity
Y. Ou, A. Rupert, M. Sandberg, S. Weber
University of Pittsburgh, Pittsburgh, PA, USA
University of Gothenburg, Gothenburg, Sweden
Ectopeptidases are commonly accepted to be a means of clearing active peptides. However, studies have shown that they can also regulate peptide activity. We have developed a technique of electrokinetic push-pull perfusion (Ek-PPP, Figure 1) to examine this largely unexplored mechanism of modulation of peptide function. We push the neuropeptide galanin through organotypic hippocampal slice ...
S. Singer, W. H. Green
Massachusetts Institute of Technology, Cambridge, MA, USA
Transient, two-dimensional (axisymmetric) simulations of a cigarette subject to realistic static and forward smoldering cycles were performed. The computational domain consists of a porous packed bed of tobacco and a filter surrounded by a thin, porous paper and a region of surrounding air. The governing equations include overall mass conservation, momentum conservation, conservation equations ...
S. Mohammadighavam, B. Kløve
University of Oulu, Department of Process and Environmental Engineering ,Oulu, Finland
After rapid mixing of waste water and coagulant, an effective slow mixing during a reasonable retention time will cause to grow the size of flocs up which will settle out easily. Around-the-end hydraulic mixer with barriers is one of the efficient facilities that have been used in water treatment plants for this purpose. A uniform velocity gradient (G) is needed to achieve efficient mixing and ...