Bulk flow—Pressure difference Plant Physiology UNI 2009.

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Presentation transcript:

Bulk flow—Pressure difference Plant Physiology UNI 2009

Pressure difference Pipe #1 Pressure = +1 bars Liquids: both positive pressure Valve (closed) X Pipe #2 Pressure = +3 bars What happens when we open valve?

Pressure difference Pipe #1 Pressure = +1 bars Valve (open) Pipe #2 Pressure = +3 bars Bulk Flow from higher to lower pressure Pressure difference = ? ( ) Liquids: both positive pressure

Pressure difference Pipe #1 Pressure = -2 bars Valve (closed) X Pipe #2 Pressure = -5 bars What happens when we open valve? Liquids: both negative pressure

Pressure difference Pipe #1 Pressure = -2 bars Liquids Valve (open) Pipe #2 Pressure = -5 bars ( ) Bulk Flow from higher to lower pressure Pressure difference = ?

Pressure difference Pipe #1 Pressure = +1 bars Valve (closed) X Pipe #2 Pressure = -4 bars What happens when we open valve? Liquids: one negative pressure one positive pressure

Pressure difference Pipe #1 Pressure = +1 bars Valve (open) Pipe #2 Pressure = -4 bars ( ) Liquids: one negative pressure one positive pressure Bulk Flow from higher to lower pressure Pressure difference = ?