Poiseullie’s Formula tells us about Viscous Resistance which confused me that if viscous force and viscous resistance are the same thing?
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1 Answer
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Drag (what you call resistance) is defined as the component of the force exerted on a body by the fluid in the direction of the free-stream velocity.
This force is the result of the integral of the stress on the surface of the body, the stress has both viscous and non-viscous (like those due to pressure) contributions.
