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[Question #251226]: how to use boundaryPressure and imposePressure in FlowEgine

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From: liucheng83 <question251226@xxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 05 Jul 2014 01:17:27 -0000
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New question #251226 on Yade:
https://answers.launchpad.net/yade/+question/251226

Hi,

I want to add a drainage condition boundary in middle circle zone in the soil surface to drain water away? 
How to use boundaryPressure or imposePressure in FlowEgine? I know flow.imposePressure((1,1,1),0) can add zero pressure at the point (1,1,1), but how to add the zero pressure on a small area not on total surface? 
Can boundaryPressure do that? Give a small example to use the command please. I cannot understand the meaning of the documentation.

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