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Numerical simulation of high pressure hydrogen release through an expanding opening

Title:

Numerical simulation of high pressure hydrogen release through an expanding opening

Khaksarfard, Reza and Paraschivoiu, Marius (2012) Numerical simulation of high pressure hydrogen release through an expanding opening. International Journal of Hydrogen Energy, 37 (10). pp. 8734-8743. ISSN 03603199

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2012.02.061

Abstract

Computational Fluid Dynamics is an effective tool to develop safety standards related to the sudden release of hydrogen from a high pressure reservoir. In this work, a three-dimensional in-house code is developed to numerically simulate the release of high pressure hydrogen (70 MPa) from a reservoir when the release area into air is expanding with time. Furthermore, high pressure hydrogen flows cannot be accurately simulated by the ideal gas equation; therefore the Abel-Noble real gas equation of state is applied. A transport equation is solved to find the concentration of hydrogen and air in the hydrogen-air mixture generated soon after release. The novelty of this work is to simulate and to study the flow when the release area enlarges rapidly. To obtain this capability, the solid boundaries of the release area are moved and the mesh follows based on a spring method. All the nodes in the mesh are moved at each time step accordingly to have a good quality mesh. Three initial diameters of 1.0 mm, 1.5 mm and 2.0 mm are tested for the release area, and opening wall speeds of 80 m/s and up to 300 m/s are discussed.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Article
Refereed:Yes
Authors:Khaksarfard, Reza and Paraschivoiu, Marius
Journal or Publication:International Journal of Hydrogen Energy
Date:2012
Keywords:Hydrogen, expanding nozzle flow, Moving Mesh, Real gas, Abel-Noble
ID Code:974128
Deposited By:ANDREA MURRAY
Deposited On:12 Jun 2012 10:23
Last Modified:12 Jun 2012 10:23
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