L. Dube, W. McElroy, and D. Pepper
University of Nevada, Las Vegas, Nevada, USA
We discuss the use of COMSOL Multiphysics 3.4 in the aerodynamic optimization process of the UNLV solarpowered UAV. We also address the use of COMSOL’s Multiphysics ability and how it was used within the scope of the project. In particular we highlight the development of wingtip devices, some of which are non-planar lifting surfaces, and we analyze how these changes affect the airframe ...
A. Egedy, B. Molnar, T. Varga, T. Chován
Department of Process Engineering, University of Pannonia, Veszprém, Hungary
The primary aim of using jet as mixer, like in case of other mixing devices, is to increase the heat and mass transfer between the phases. Beside the injection position the geometry of the jet mixer and the injection nozzle has a major effect on the injection. In our study COMSOL Multiphysics software was used to carry out the experimental and simulation of the different jet geometries. The jet ...
A. Pezzin, A. Ferri
Politecnico di Torino, Torino, Italy
Air permeability is one of the most important parameters in the study of thermo-physiological comfort of fabrics. The main goal of this work is to develop a virtual process that allows the prediction of air permeability of any fabric without realizing a sample. The Free and Porous Media Flow physics interface was used in COMSOL Multiphysics® software; this allows to use Navier-Stokes equation ...
I. Neitzel, R. C. F. do Nascimento, C. C. Bueno
Faculdade de Telêmaco Borba - FATEB, Telêmaco Borba, Paraná, Brasil
Neste trabalho é analisado o comportamento dos perfis de temperatura e umidade e sua penetração em bobinas de papel submetidas a longos períodos de armazenagem. O modelo considera a transferência simultânea de calor e massa com o efeito Soret, mas sem o efeito Latour. O sistema é fechado em relação à umidade e aberto em relação à energia. As propriedades térmicas são dependentes da umidade e ...
LIMCA技术是一种原位测量高温液态金属中杂质颗粒的方法。测量的原理为：在一个小孔内外设置一对电极，并且通以电流，这样可以在孔口附近形成一个电敏感区，当杂质经过电敏感区时，通过测量电压脉冲信号以检测杂质的信息。对硬质颗粒的LIMCA技术已经有了许多研究，但实际情况下有些颗粒如气泡是可变形的，这将损害LIMCA的精度。 模型使用了 COMSOL Multiphysics® 中的“层流两相流-相场”和“电磁场”模式，气泡和液态铝以相同的初始速度向相同方向运动，同时在液态导电金属中通以电流。由于流体和气泡是运动的，流动会受到洛伦兹力的影响，所以在流场中加入由电磁场计算得到的“mef.FLtzr”和“mef.FLtzz”作为体积力源项。同时流动结构的改变也会影响电磁场，两个物理场之间存在着强耦合，需要同时求解。 数值计算结果给出了在气泡变形情况下的流场、电磁场 ...
N. Luchier [1,2], P. Forestier [1,2], E. Bouleau [1,2]
 Univ. Grenoble Alpes, Grenoble, France
 CEA, Grenoble, France
Our laboratory is currently leading the design and the manufacture of a novel device that allows NMR spectroscopy to be cooled down to cryogenics temperature (in the 10-100 K range). The system features a sample-holder that rotates at very high frequencies (f >10 kHz). Two aerostatics gas-bearings, allows this sample holder to be suspended in its chamber thanks to a Helium flow. A second Helium ...
E. D. Skouras , A. N. Kalarakis , M. S. Valavanides , V. N. Burganos ,
 Foundation for Research and Technology, Hellas/Institute of Chemical Engineering Sciences, Patras, Greece
 Dept of Mechanical Engineering, TEI of Western Greece, Patras, Greece
 Dept of Civil Engineering, Applied Mechanics Laboratory, TEI of Athens, Athens, Greece
In general, macroscopic two-phase flow in porous media is a mixture of connected and disconnected oil flow. The latter is expressed as ganglion dynamics and drop traffic flow, patterns observed experimentally in pore network models [1,2] and real porous media [3,4]. This characteristic was adversely not taken into account in previous modeling approaches. The mechanistic model DeProF , ...
Preliminary Study of Particle Trajectory and Secondary Flow in Bend Configurations to Reduce Erosion
O. Ayala , A. Arruda , L. Calembo , E. Enes , D. Monteiro , R. Paizante , A. Rocha , M. Simões , J. Michaeli ,
 Department of Engineering Technology, Old Dominion University, Norfolk, VA, USA
 Brazil Scientific Mobility Program, CAPES, Brasilia, DF, Brazil
To the best of our knowledge, only few researchers have made attempts to minimize the erosion in bends by modifying the bend configuration in order to alter the particle-laden flow pattern to reduce the erosion. In this work, we revisited those previously proposed bend configurations to reduce erosion, in additional to two of our own design. We found that secondary flows play an important role ...
P. Sharma, S. K. Dash, B. K. Nashine, S. S. Kumar, R. Veerasamy, B. Krishnakumar, P. Kalyanasundaram, and G. Vaidyanathan
 Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu
Sodium is used as a coolant in Fast Breeder Reactors. Eddy Current Flowmeter (ECFM) is used for measurement of sodium flow in the primary pump and at the outlet of the subassemblies. Eddy Current Flowmeter (ECFM) works on the principle of change in the magnetic field profile due to induced eddy currents as a result of sodium flow. It consists of a central primary winding, energized from an A.C. ...
P. Qian [1, 2],
 University of Wisconsin - Madison, Madison, WI, USA
 SmartUQ, Madison, WI, USA
Uncertainty appears in many aspects of physical simulations including stochastic design parameters, hard-to-specify input distributions, probabilistic boundary and initial conditions, and unknown geometries. Uncertainty Quantification (UQ) has emerged as the science of quantitative characterization and reduction of uncertainties in both simulation and test results. Stretching across applied ...