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Analysis of Hydrodynamic Plain Journal Bearing

Ravindra Mane[1], Sandeep soni[1]
[1]Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India

This paper presents the 3D model of hydrodynamic plain journal bearing using COMSOL Multiphysics®. Using 3D Model, pressure distribution in plain journal bearing is obtained by steady state analysis of plain journal bearing. Generalized Reynolds equation is used for analyzing hydrodynamic journal bearing by COMSOL Multiphysics® as well as by analytical method by applying Sommerfeld boundary ...

Modelling and Simulation of a Single Particle in Laminar Flow Regime of a Newtonian Liquid

D. Jamnani[1]

[1] Alpha Project Service, Vadodara, Gujarat, India

The interaction of a single particle in straight rectangular channel in laminar flow is modelled explicitly using the set of Navier Stokes equation for the fluid motion and Newton momentum equation for the particle motion in Cartesian coordinate system. The evaluation of integral force acting on the particle along with the behaviour of streamlines as a function of Reynolds number ReP < 120 is ...

COMSOL Implementation of a Multiphase Fluid Flow Model in Porous Media

M. Diaz-Viera, D. Lopez-Falcon, A. Moctezuma-Berthier, and A. Ortiz-Tapia
Instituto Mexicano del Petroleo, México D.F., Mexico

The aim of the present work is to implement in COMSOL Multiphysics a multiphase fluid flow model in porous media, also known in the oil reservoir engineering literature as a black oil model, using a standard finite element approach. In particular, we are interested to apply this model coupled with a multiphase, multicomponent transport model to study Enhanced Oil Recovery processes at laboratory ...

Coupled PDEs with Initial Solution from Data in COMSOL Multiphysics®

M. K. Gobbert[1], X. Huang[1], S. Khuvis[1], S. Askarian[1], B. E. Peercy[1]
[1]University of Maryland - Baltimore County, Baltimore, MD, USA

This paper presents information on techniques needed in COMSOL Multiphysics® to enable computational studies of coupled systems of PDEs for time-dependent non-linear problems. Furthermore, we demonstrate how to use data files as input for initial conditions. To illustrate the techniques, we consider a system of two time-dependent non-linear PDEs from mathematical biology that couples an ...

Residence Time Distribution for Tubular Reactors - new

L. R. de Souza Jr.[1], L. Lorenz[1]
[1]Universidade Federal do Paraná, Curitiba, Paraná, Brazil

In the core of Chemical Engineering is the reactor design that includes most of all scientific disciplines. The reactors, in general, are treated ideally. Unfortunately, it is observed in the real world a very different behavior from that expected. Thus, to characterize nonideal reactors is used, among others, residence time distribution function E(t). The aim of this present work is to ...

Dynamics of Rotors on Hydrodynamic Bearings

R. Eling[1]
[1]Mitsubishi Turbocharger & Engine Europe, Almere, The Netherlands

This study presents a rotordynamic analysis of a rotor on hydrodynamic bearings using COMSOL Multiphysics®. In this paper, the complexity of the model is gradually increased. Starting point of the analysis is the modal analysis of the rotor in free-free conditions. A Reynolds model is set up to predict the film pressure distribution under shaft loading. Due to the cross coupling terms of the ...

Numerical Study of Navier-Stokes Equations in Supersonic Flow over a Double Wedge Airfoil using Adaptive Grids

V. Gopal[1], R. Kolluru[1]
[1]BMS College of Engineering, Bangalore, Karnataka, India.

Numerical study of aerodynamic characteristics in steady laminar supersonic flow over a double wedge airfoil is carried out using commercially available finite element based CFD tool COMSOL Multiphysics. The aerodynamic characteristics of double wedge airfoil like lift and drag are analyzed by solving Navier-Stokes equations in the flow field for various thickness to chord ratios (t_c) and angle ...

Newtonian and Non-Newtonian Blood Flow over a Backward-Facing Step: Steady-State Simulation

M.W. Siebert[1], and P.S. Fodor[1]
[1]Physics Department, Cleveland State University, Cleveland, Ohio, USA

In this work, the fluid flow over a 2D backward-facing step is analyzed in order to provide a case study for the use of different models for the blood dynamic viscosity in COMSOL Multiphysics. Three non-Newtonian models, as well as the Newtonian model are used to study the shear stresses and the reattachment length as a function of the fluid speed. The non-Newtonian models used in this study are ...

Design of Small-Scaled de Laval Nozzle for IGLIS Experiment

E. Mogilevskiy[1], R. Ferrer[1], L. Gaffney[1], C. Granados[1], M. Huyse[1], Yu. Kudryavtsev[1], S. Raeder[1], P. Van Duppen[1]
[1]KU Leuven, Instituut voor Kern- en Stralingsfysica, Leuven, Belgium

De Laval nozzles are used in supersonic aerodynamical tubes and engines. They are also employed for the production of cold gas jets to be used in chemical reactions studies. Recently, cold gas jets have been proposed of In-Gas Laser ionization Spectroscopy (IGLIS) The nozzle has a converging and a diverging part with a throat between them. High gas pressure and temperature, and low velocity ...

Simulation of Droplet Impingement on a Solid Surface by the Level Set Method - new

J. Hu[1], R. Jia[1], K. Wan[2], X. Xiong[3]
[1]Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
[2]Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA
[3]Department of Electrical Engineering, University of Bridgeport, Bridgeport, CT, USA

The dynamic behavior of droplet impingement on a solid surface is important to many engineering applications. This paper studied the dynamic behavior of a droplet impinging onto solid dry surfaces with different surface wettability using the COMSOL Multiphysics® software. The simulation results were validated against experimental results. It was found that the Level Set method can predict the ...

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