What is the shear force of a fluid (velocity $\vec{u}$) near the wall for a moving wall (velocity ($\overrightarrow{u_{wall}}$))?

Question

TuteeHUB · Accepted Answer

$\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}$

TuteeHUB · Answer

$\vec{F}=-\mu\frac{\vec{u}}{\Delta y}\times area$

TuteeHUB · Answer

$\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}\times area$

TuteeHUB · Answer

$\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}$

TuteeHUB · Answer

$\vec{F}=-\mu\frac{\vec{u}}{\Delta y}$

1.	What is the shear force of a fluid (velocity \(\vec{u}\)) near the wall for a moving wall (velocity (\(\overrightarrow{u_{wall}}\)))?
A.	\(\vec{F}=-\mu\frac{\vec{u}}{\Delta y}\times area\)
B.	\(\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}\times area\)
C.	\(\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}\)
D.	\(\vec{F}=-\mu\frac{\vec{u}}{\Delta y}\)
Answer» C. \(\vec{F}=-\mu\frac{\vec{u}-\overrightarrow{u_{wall}}}{\Delta y}\)

What is the shear force of a fluid (velocity \(\vec{u}\)) near the wall for a moving wall (velocity (\(\overrightarrow{u_{wall}}\)))?