University of Minnesota-Duluth, Duluth, MN, USA
Significant submarine mineral deposits form when hot, metal-laden, saline fluids emerge onto the seafloor and mix with ambient seawater. Resulting density changes of fluid mixtures can trigger fluid buoyancy reversals, brine pool formation, and metal accumulation (Figure 1). While some of these processes are known from experiments, the inception, development, and physical-chemical processes ...
V. Sharma , S. Pramanik , M. Mishra ,
 Indian Institute of Technology Ropar, Rupnagar, India
 Indian Institute of Technology Ropar, Rupnagar, India; Nordita, SE-10691 Stockholm, Sweden.
COMSOL Multiphysics® software was used to model radial source flow in two dimensional homogeneous porous media. Two-Phase Darcy's Law (tpdl) is used to model miscible viscous fingering. Fingering patterns obtained on using different mesh are discussed. Evolution from 'flowers' to 'branches' is observed in the fingering patterns. Stable displacement is generated even in the presence of unstable ...
A. Sen , D. Myers , A. Altemose ,
 Department of Chemistry, Pennsylvania State University, University Park, PA, USA
This poster studies catalytic micropumps and their ability to induce fluid flow on the microscale. The goal of the study is to design a long-distance, directed convective loop. An array of catalytic micropumps was constructed in the domain, comprised of two distinct catalysts in an alternating pattern with a uniform concentration of their respective reagents in the surrounding geometry. Two ...
D. Song, R. Gupta, and Chhabra
West Virginia University, Morgantown, West Virginia, USA
Indian Institute of Technology, Kanpur, India
Heat transfer from a sphere having a uniform temperature and falling axially in a cylindrical tube filled with an incompressible power-law liquid is numerically investigated. The governing equations for simultaneous flow around a confined sphere and heat transfer to power-law fluids were solved numerically using COMSOL Multiphysics. It was found that the wall effects on the mean Nusselt number ...
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 ...
J. Blackburn , N. McCartney ,
 National Physical Laboratory, London, UK
We present computer simulation results for PEM fuel cells using COMSOL Multiphysics® software. We have developed novel PDE equations at NPL from first principles and these are more realistic than models typically used in literature. The theory includes Maxwell-Stephan and Nernst-Planck equations for the diffusion and electrochemistry as well as equations governing electrostatic and stress/strain ...
S. Durand , C. Dubois , P. Lafleur , V. Panchal , D. Park , P. Paradis , D. Lepage 
 École Polytechnique de Montréal, Montréal, QC, Canada
 US Army ARDEC, Picatinny Arsenal, NJ, USA
 General Dynamics OTS Canada Valleyfield, Salaberry-de-Valleyfield, QC, Canada
A novel propellant technology requires extruding two formulations with differential burning rates (slow and fast) together as a multilayered propellant. This multilayered propellant is processed into a concentric cylinder configuration, in the form of slow-fast-slow with single perforation. The main challenge originated from the different path lengths between the inner and outer sections of the ...
韩传锟 , 程嘉 , 路益嘉 , 杨义勇 
为抑制离子轰击靶材，提高亚稳态原子密度而提出了离子筛选 ICP（I-F ICP）设备，可以有效地抑制带电粒子到达靶材表面，亚稳态原子与电子/离子数量比值明显提高，有助于 CVD 工艺中靶材表面的活化。本文通过 COMSOL Multiphysics® 中耦合等离子体和流场接口对 I-F ICP 腔室建模仿真，腔室结构见图1，应用氩气放电仿真研究了离子筛网的过滤效果。首先对比有无耦合流场的结果，结果显示了耦合流场仿真的必要性。用等离子体场与流场耦合计算，等离子体场为流场提供流体的特性参数密度和动力学粘度系数，流场接口为等离子体接口提供速度场和决定压力等参数并提供进、出气口，详细的计算流程见图2。仿真结果显示离子筛网能够改变等离子体放电参数（电子/亚稳态原子数密度、电子温度、电子电势等）的分布，有效地阻止带电粒子到达靶材表面，增加靶材表面发生反应的亚稳态原子比重；其次 ...
J. Sparkes ,
 University of Sheffield, Sheffield, UK
Silk is one of the longest used and most recognizable textiles that we, as a society, use regularly. We see it as a luxury good, worn as an indicator of success and value. However, despite mankind having domesticated and farmed silkworms for millennia, we still know relatively little about the manufacturing process which converts the liquid silk into the fibers we are so familiar with. Increased ...
B. Baudouy and F. Visentin
CEA, Irfu, SACM, Gif-sur-Yvette, France
The construction of high magnetic field superconducting coils requires the use of low temperature superconductors that must be cooled down to liquid helium temperature (4.2 K). Natural two-phase convection loops, i.e. thermosiphon loop, are used as cooling system for large superconducting magnets mainly because of its passive nature. The study present a thermohydraulics model realized with ...