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Engineering
Mechanical Engineering
Just curious about many things like hydrostatics
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[QUOTE="jrmichler, post: 6867110, member: 638574"] It may interest you to know that this is not just an abstract physics problem, but a real world problem that tripped up at least one engineer. The diagram below shows the system. A tank containing ##TiO_2## slurry with specific gravity about 2, had a pump that supplied a distribution pipe located about 40 feet above the tank liquid level. The line had a valve located just after the pump that opened when the pump was on, and closed when the pump turned off. The discharge end of the line was below the surface of the slurry. [ATTACH type="full"]323799[/ATTACH] Every time the pump started, there was a KABLAAMM that shook the pipes enough that the pipes were in danger of breaking. The flow rate and viscosity were such that the entire line ran full when the pump was running. When the pump stopped and the valve closed, the slurry continued to flow until the liquid level in the downward portion of the pipe was about 15 feet above the tank liquid level. There was a vacuum* from that point up to the distribution pipe at 40 feet up. When the pump started up, the flow was helped by the vacuum until the new supply of slurry met the slurry standing in the downpipe with a loud crash. The solution was to add another valve in the downpipe just above the tank to keep the slurry from running down and creating a vacuum gap. Problem solved. *More correctly water vapor as discussed by [USER=447632]@Baluncore[/USER] above. But for engineering purposes, it's a vacuum. [/QUOTE]
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Forums
Engineering
Mechanical Engineering
Just curious about many things like hydrostatics
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