Project ForgeFluid Mechanics
Bernoulli's Equation & Flow
GATE 2008
Medium
A two dimensional fluid element rotates like a rigid body (a forced vortex). At a point within the element, the pressure is 1 unit. The radius of the Mohr's circle characterizing the state of stress at that point is
- A0.5 unit
- 0 unit
- C1 unit
- D2 units
Explanation
For a fluid element in rigid-body rotation, the stress state is purely isotropic pressure (σx=σy=-p, τxy=0) with no shear — this is a point on the Mohr's-circle diagram, so its radius is 0.
Source: GATE ME 2008 (2008)
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