Eswaran M, P. Goyal, Anu Dutta, G.R. Reddy, R. K. Singh , K.K. Vaze
Bhabha Atomic Research Centre, Mumbai, India
A 2-D unsteady viscous flow around two cylinders is studied by numerical solutions of the unsteady Navier-Stokes equations with a finite element formulation using COMSOL Multiphysics®. The results of a numerical investigation of the Strouhal frequencies of two identical, stationary, parallel circular cylinders arranged in staggered configurations is presented in this paper. A simple two cylinder ...
T. Guerra, J. Tiago
Escola Superior de Tecnologia do Barreiro do Instituto Politécnico de Setúbal, Barreiro, Portugal
Instituto Superior Técnico da Universidade de Lisboa, Lisboa, Portugal
Numerical simulations applied to blood flow together with the imaging processing advances are a powerful tool in the prevention and treatment of some diseases. The inclusion of real data in the numerical blood flow simulations allows the achievement of more realistic and accurate results. In the literature, these techniques are known as Data Assimilation (DA). We solve a variational DA problem ...
Investigation of Mean-Flow Effects on Tubular Combustion Chamber Thermoacoustics Using a Burner Transfer Matrix Approach - new
A. Andreini, B. Facchini, A. Innocenti, D. Pampaloni
University of Florence, Florence, Italy
The paper presents a methodology to account for local mean-flow effects on thermo-acoustic instabilities to improve typical calculations performed under the zero-Mach number assumption. A 3D FEM model of a simplified combustor is solved with COMSOL Multiphysics® Pressure Acoustics interface. The Helmholtz equation is used to model the combustor and the classical k-τ model for the Flame Transfer ...
K. Karthikeyan , L. Sujatha
Rajalakshmi Engineering College, Chennai, Tamil Nadu, India
This paper presents the design and simulation of micromixer for Lab-On-Chip (LOC) applications. There are two types of micromixers: one is an active micromixer and another one is a passive micromixer. This paper investigates microfluidic flow characterization and mixing rate of two fluids in a micro- channel. Understanding the microfluidic flow at the micro channel is a develop methods of mixing ...
E. Carcadea, M. Varlam, I. Stefanescu
National Research Institute for Isotopic & Cryogenic Technologies, Rm.Vâlcea, Romania
Steam methane reforming is a widely studied process because of its importance for hydrogen production. A two-dimensional membrane-reactor model was developed to investigate the steam-methane reforming reactions. The use of membrane as membrane-reactor separator offer us few advantages because it help in continuously removing the hydrogen from the reaction zone, shifting the chemical equilibrium ...
Th. B. J. Campmans,
LBPSIGHT, Nieuwegein, The Netherlands
A installation caused severe hum, with 30 Hz as dominant frequency, causing serious annoyance. The acoustic study showed resonances around 30 Hz. Poor flow conditions existed at the inlet and outlet of the forced draft fan. Flow patterns were studied using CFD. Both the inlet and outlet contained large vortices, causing the strong hum. Changes in the design were studied. The finally changes ...
O. Ecin, E. Engelien, M. Malek, R. Viga, B. Hosticka, and A. Grabmaier
Institut of Mikroelektronische Systeme, University Duisburg-Essen, Duisburg, Germany
Institut of Elektronische Bauelemente und Schaltungen, University Duisburg-Essen, Duisburg, Germany
This communication reports on a numeric fluid dynamics simulation on a pipe flow model. The basic background is to determine the velocity of a flowing fluid in a pipe by using the Thermal Time-Of-Flight (TTOF) method on water. The visualization of the temperature and velocity distribution in the pipe model is being carried out in order to enable proper design and optimization of the TTOF sensor. ...
N.D. Barnett, and E. Gutirrez-Miravete
General Dynamics-Electric Boat, Kingston, Rhode Island, USA
Rensselaer at Hartford, Hartford, Connecticut, USA
This paper report on a study of the hydrodynamics of skimboards and surfboards using the computational fluid dynamics (CFD) module in COMSOL. The study analyzes the flow in a thin water layer underneath a skim board in a 2-D Cartesian coordinate. Three different sets of boundary conditions were employed and one of them produced the best agreement with previous findings.
Optimization of Extrusion Processes for non-Newtonian high-Viscous Fluids with Wall Slip and Shear Thinning Effects
W. Hoffmann, M. Scholz
SiCo-Solutions, Stuttgart, Germany
Simulation of the flow behaviour of non-Newtonian fluids with high viscosities leads to special material models with specific material parameters. In this presentation, a material model consisting of 4 material parameters describing the flow itself and also the wall slip is presented. The investigations of the flow behaviour are based on COMSOL Multiphysics® using the Modules CFD, Structural ...
Vikas N Bhargav, Vivek Ganeshan, Muralidhara Holla, Ramesh Kolluru
Mechanical Engineering Department, BMS College of Engineering, Bangalore, India
Ejectors are the devices used to carry out mixing and recompression of two fluid streams, one with higher energy and the other with lower Energy. The high energy fluid is passed through the converging nozzle of ejector to very high velocities which in turn creates suction and draws the secondary fluid into the ejector through a secondary inlet. In the present work an attempt is made to ...