منابع مشابه
Gas flow through aerogels
Aerogels have an extraordinarily large internal surface area which is accessible via open pores, making them candidates for filters and gas adsorption media. The idea is frequently included in lists of potential applications, but little research has been conducted on the use of aerogels as filters or adsorption media. Consideration of aerogels for use as aerosol collection media requires knowle...
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The purpose of this study was to evaluate the effects of the rate of argon gas flow on joint strength in the laser-welding of cast metal plates and to measure the porosity. Two cast plates (Ti and Co-Cr alloy) of the same metal were abutted and welded together. The rates of argon gas flow were 0, 5 and 10 L/min for the Co-Cr alloy, and 5 and 10 L/min for the Ti. There was a significant differen...
متن کاملELECTRODE EFFECT ON FLOW CONDITIONS IN ARGON GAS METAL ARE MODELING
A two dimensional mathematical model has been developed for describing the temperature, flow, and electric fields in the are column of the Gas Metal Arc Welding (GMAW) of aluminum in argon shielding gas using axisymmetric Navier-Stokes, Maxwell, and differential thermal energy equations. The predicted results are most sensitive to the cathode spot radius and an optimum cathode spot radius exist...
متن کاملGas flow through clay barriers
A model for the simulation of gas flow in clayey rocks and clays is described. Gas migration is associated with the development of preferential paths along existing or pressure-dependent discontinuities. The model handles the combined phenomena of two-phase (air and liquid) flow and the generation of discrete paths. Aperture of discrete paths is the main variable to account for permeability and...
متن کاملModeling gas flow through microchannels and nanopores
Microchannel based systems have emerged as a critical design trend in development of precise control and maneuvering of small devices. In microelectronics, space propulsion and biomedical areas, these systems are especially useful. Nanoscale pores are recently becoming of great interest due to their beneficial drag and heat transfer properties. However it is difficult to predict the flow perfor...
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ژورنال
عنوان ژورنال: Japanese Journal of Applied Physics
سال: 2016
ISSN: 0021-4922,1347-4065
DOI: 10.7567/jjap.55.125202