Rheology of Powder and Porous Media in Modeling of Penetration into Porous Ceramic

2010 ◽  
pp. 27-38 ◽  
Author(s):  
B.A. Galanov ◽  
V.V. Kartuzov ◽  
S.M. Ivanov
Keyword(s):  
Porous Media ◽  
Porous Ceramic

Ultrasonic studies of liquid helium in porous media

1987 ◽  
Vol 65 (11) ◽  
pp. 1557-1559 ◽  
Author(s):  
J. R. Beamish ◽  
K. Warner
Keyword(s):  
Porous Media ◽  
Sound Propagation ◽  
Porous Ceramic ◽  
Ultrasonic Waves ◽  
Effective Density ◽  
Biot Theory ◽  
Fluid Density ◽  
Normal Fluid ◽  
Superfluid Fraction ◽  
Viscous Losses

We have studied the propagation of 12 MHz transverse ultrasonic waves in a porous ceramic containing liquid 4He. Both the sound velocity and the attenuation clearly show the superfluid nature of helium. The helium in the pores increases the system's effective density by an amount proportional to the normal-fluid density and so decreases the sound speed. The decoupling of the superfluid fraction below the lambda transition allows us to use the shear wave essentially as a "high-frequency torsional oscillator" to determine the superfluid density and pore tortuosity. The sound attenuation in this system is due to the same mechanism as for fourth sound, namely, viscous losses due to motion of the normal-fluid component. We observed an attenuation proportional to the normal-fluid density and compare this result to predictions of the Biot theory of sound propagation in fluid-filled porous media.

Homogenisation of High Pressure Diesel Fuel Spray Combustion Using Porous Ceramic Media

2012 ◽  
Author(s):  
Navid Shahangian ◽  
Damon Honnery ◽  
Jamil Ghojel
Keyword(s):  
High Pressure ◽  
Porous Media ◽  
High Speed ◽  
Porous Ceramic ◽  
Fuel Spray ◽  
Compression Ignition Engines ◽  
System Pressure ◽  
Novel Approach ◽  
Air Mixing ◽  
The Media

Interest is growing in the benefits of homogeneous charge compression ignition engines. In this paper we investigate a novel approach to the development of a homogenous charge like environment through the use of porous media. The primary purpose of the media is to enhance the spread of the high pressure fuel spray. In this paper we show through high speed visualizations of both cold and hot spray events, how porous media interactions can give rise to greater fuel air mixing and what role system pressure plays in further enhancing this process.

Physical incorporation of particles in a porous media: a path to a smart wood

2016 ◽  
Vol 74 (2) ◽  
pp. 24607 ◽  
Author(s):  
Azza Zerriaa ◽  
Mohammed El Ganaoui ◽  
Christine Gerardin ◽  
Abdel Tazibt ◽  
Slimane Gabsi
Keyword(s):  
Porous Media
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