+1 vote
in Finite Element Method by (110k points)
The velocity field of a fluid flow is denoted by v=2xi+3j. Which option exactly describes the flow?

(a) Ideal

(b) Compressible

(c) Irrational

(d) Inviscid

I got this question in a national level competition.

The doubt is from Single Variable Problems topic in division Single Variable Problems of Finite Element Method

1 Answer

+2 votes
by (185k points)
selected by
 
Best answer
Correct option is (b) Compressible

Best explanation: A fluid is said to be incompressible if ∇.V=0.

 ∇.V=\(\frac{d(2x)}{dx}+\frac{d(3)}{dy}\)

=2+0

=2.

Thus, the flow is compressible.

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