Which of these statements is correct?(a) Body force term in the momentum equation is non-linear(b) Rate of change term in the momentum equation is non-linear(c) Convective term in the momentum equation is linear(d) Convective term in the momentum equation is non-linearThe question was asked in an interview for job.My question comes from Incompressible Flows in division Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Which of these statements is correct?(a) Body force term in the moment

1.	Which of these statements is correct?(a) Body force term in the momentum equation is non-linear(b) Rate of change term in the momentum equation is non-linear(c) Convective term in the momentum equation is linear(d) Convective term in the momentum equation is non-linearThe question was asked in an interview for job.My question comes from Incompressible Flows in division Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Answer» Right option is (d) Convective TERM in the momentum equation is non-linear For explanation: The convective term in the momentum equation is given by \(\FRAC{\partial(\rho u_i u_j)}{\partial x_j}\). Where, ρ and U are density and velocity respectively. This term is a non-linear term. The RATE of change and the body force TERMS are linear.

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