lutindiable Posted June 12, 2007 Share Posted June 12, 2007 does anyone out there heard af any processes that create uncontained vacuums? i tried searchin all over and all i found was a form of weapon what creates this, "BIG BLU" weapons which include the "moab" heres whats said about it "Basically explosion eats up all Oxygen in the blast area as it explodes outward in a fireball, creating a large uncontained vacuum. If you survive that, the zero pressure area sucks air back in at 2000 MPH" so it is possible to create an uncontained vaccum, its just maintaining it, any ideas at all? Link to comment Share on other sites More sharing options...
insane_alien Posted June 12, 2007 Share Posted June 12, 2007 its not zero pressure. its just lower than atmospheric. it works in the same way low pressure systems in the weather work. hot air rises. the big fire ball is hot, it rises fast and therefore pulls in a lot of air behind it. implosions like you are imagining don't really exist. <Additional> i looked up BIG BLU, its very much an explosive device. it just penetrates 200ft of 5000psi concrete first. Link to comment Share on other sites More sharing options...
SkepticLance Posted June 12, 2007 Share Posted June 12, 2007 I suspect what you were reading about is a fuel-air explosion - a weapon of war. A tanker aircraft sprays an aerosol of petroleum fuel over the target area. When it has reached a safe distance, it ignites the fuel. The combustion both uses up oxygen and causes massive heat and expansion of gas for a moment. This leaves the air thin and devoid of oxygen. It is NOT a vacuum. However, to the poor bastards who are inside the zone, it is close enough, since there is no oxygen. They die of asphyxiation if the heat or blast have not killed them first. Link to comment Share on other sites More sharing options...
lutindiable Posted June 12, 2007 Author Share Posted June 12, 2007 thats actual text from a site i googled http://rantburg.com/poparticle.php?ID=11167&D=2003-03-11 but the theory is the same, its all to do with differentials in pressure Link to comment Share on other sites More sharing options...
insane_alien Posted June 12, 2007 Share Posted June 12, 2007 oh you mean the daisy cutter. yeah. thats a normal bomb. 70MPa over pressure according to wikipedia and its references. http://en.wikipedia.org/wiki/BLU-82 most definitely not a vacuum device. Link to comment Share on other sites More sharing options...
swansont Posted June 12, 2007 Share Posted June 12, 2007 This leaves the air thin and devoid of oxygen. It is NOT a vacuum. Lower pressure is precisely what a vacuum is. It's only a question of how good the vacuum is. the zero pressure area sucks air back in at 2000 MPH" Vacuums don't suck. The higher-pressure region blows. Link to comment Share on other sites More sharing options...
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