+1 vote
in Finite Element Method by (110k points)
For the vector form of the finite element model of momentum and continuity equations MΔ+K^11Δ+K^12P=0 what is the order of matrix F if the order of M is 2n x 2n?

(a) 2n x 1

(b) 1 x 2n

(c) m x 2n

(d) 2n x m

I got this question during an online interview.

This question is from Velocity topic in division Flows of Viscous Incompressible Fluids of Finite Element Method

1 Answer

+2 votes
by (185k points)
selected by
Best answer
The correct answer is (a) 2n x 1

For explanation: In the vector form, the terms M and K^11 are of the order 2n x 2n, K^12 is of the order 2n x m, K^21 is of the order m x 2n. The equation MΔ+K^11Δ+K^12P=F^1 gives the vector form, where F is force matrix, M is a mass matrix, K^11 is related to velocity term, K^12 is related to the pressure term, P is the pressure matrix, and Δ is the velocity matrix. Note that

Related questions

We welcome you to Carrieradda QnA with open heart. Our small community of enthusiastic learners are very helpful and supportive. Here on this platform you can ask questions and receive answers from other members of the community. We also monitor posted questions and answers periodically to maintain the quality and integrity of the platform. Hope you will join our beautiful community