Absolute value of pressure gradient \nabla p along the fluid flow direction \displaystyle {\bf l} = \frac{\bf u}{u}:
| \frac{dp}{dl} = {\bf l} \cdot \nabla p |
where \bf u is the fluid velocity.
See also
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Absolute value of pressure gradient \nabla p along the fluid flow direction \displaystyle {\bf l} = \frac{\bf u}{u}:
| \frac{dp}{dl} = {\bf l} \cdot \nabla p |
where \bf u is the fluid velocity.
[ Head loss ]