M. Hashiguchi ,
 Keisoku Engineering System Co., Ltd., Chiyoda-ku, Tokyo, Japan
Vortex ring can be useful to generate thrust force for e.g., jellyfish, but its mechanism has not been clarified. In this field, it seems that numerical simulation has an important role of understanding the propulsion mechanism of creature. A vortex ring in a tube, refered to confined vortex ring, have been far less studied compared with unconfined vortex rings, despite their importance for many ...
O. Ayala , M. F. Degenring Oliveira , P. Loures ,
 Department of Engineering Technology, Old Dominion University, Norfolk, VA, USA
 Brazil Scientific Mobility Program, CAPES, Brasilia DF, Brazil
Reynolds Numbers effect: In the first bend, the higher the Reynolds number, the longer the first pair of vorticities stays attached to the wall. In the second bend, the higher Reynolds Numbers, the secondary flow from the first bend dominates. Curvature Radius effect: The smaller the curvature radius is, the stronger the vorticity magnitude is, and longer it will take for the second pair of ...
A. Alshayji , A. Abograis 
Kuwait University, Kuwait City, Kuwait
COMSOL Multiphysics® is used in this study to simulate the flow around a square cylinder and focus on reducing the forces on the cylinder by passive control methods. Numerical simulations are made to find optimum cases of control methods that guarantee maximum reduction for Reynolds number 160 based on the width of the square cylinder (W) and the inlet flow velocity (U_in). The selection of the ...
Application of Kelvin's Inversion Theorem to the Solution of Laplace's Equation Over a Domain That Includes the Unbounded Exterior of a Sphere
Florida Institute of Technology, Melbourne, FL, USA
In simulating physical systems modeled as solutions of partial differential equations over an unbounded domain, a challenge arises owing to the impossibility to cover an unbounded domain with a mesh. A classical problem in fluid dynamics, a solid sphere of radius a_s is submerged in a tank of water (at rest) of much larger size. The water is disturbed by the sphere’s sudden acceleration in the z ...
E. Gutierrez-Miravete, C. J. Walsh
Rensselaer at Hartford, Hartford, CT, USA
General Dynamics-Electric Boat, Groton, CT, USA
The major steps in the beer making process are simple and with some skill, rather good brew can be produced using a common picnic cooler. First, grain (usually barley) is wetted and allowed to partially germinate before dried in a kiln (malting) Next, during mashing in a mash tun reactyor the malted grains are soaked in hot water in to extract the fermentable sugars and then rinsed slowly to ...
A.W.M. (J.) Van Schijndel , D. P. M. Jacobs ,
 Eindhoven University of Technology, Eindhoven, Netherlands
Pioneering Computational Models for the Built Environment Energy performance is becoming more important in the build environment. With better insulated buildings, the possibility of moisture problems and thermal bridges increases. There for, it is not only important to determine the energy performance of a building, but also whether moisture problems occur. There are several programs in which ...
S. Ebrahim, A. Alshayji
Department of Mechanical Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait City, Kuwait
The study produced a simulated model of natural convection in an inclined rectangular channel open ended with different locations of radiant barrier (RB) along the channel thickness(S). The upper plate is heated by various uniform constant heat fluxes while the inner surface of the lower plate has a very thin layer with low emissive aluminum foil. This model was used to adjust the location of ...
S. Curet , A. Lakoud , M. Hassouna 
 L’UNAM Université, ONIRIS, CNRS, GEPEA, Nantes, France
 Ecole Supérieure des Industries Alimentaires de Tunis, Tunis El Khadra, Tunisie
The control of the hydration during the thermal process of dates is crucial in order to save energy and to obtain a good quality for the final product. In this work, a theoretical model was developed in COMSOL Multiphysics software to describe the mass transfer phenomena involved in this operation. The model allowed to estimate both moisture diffusivity and convective mass transfer coefficient ...
S. Cortés, D. Güemes, R. Ávila
Universidad Nacional Autónoma de México, Mexico City, Mexico
The study of low Reynolds number flow around air vehicles of the order of centimeters. According to DARPA, a NAV is defined as a vehicle with 7.5 cm of length and weight of 20 grams. We calculated the flow around a small length scale 3D rigid body with complex geometry. Firstly we perform the numerical simulation of the two dimensional flow around a circular cylinder for 30< ReD
F. F. Dall'Agnol, A. Pavani
Center for Information Technology Renato Archer, Campinas, SP, Brazil
Evaporative coolers are viable alternative to air conditioners because of their low power consumption. However, in tropical humid environments the increased humidity that accompanies the cool air in the evaporative coolers causes an uncomfortable wet feeling, since it hinders the evaporation of our natural transpiration. Here we test a configuration of evaporative cooler called Indirect Cycle ...