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Old   June 15, 2015, 03:34
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Mohit
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hello guys, Having some difficulties solving these questions, Can anyone help me please

Question 1: The fundamental governing equations of computational fluid dynamics are ………….,…………. and ……………… equations?

Question 2: CFD results are …………………. Solutions of the governing equations
a. Theoretical
b. Approximate
c. Analytical
d. Statistical

Question 3: What are some of the advantages of using CFD
a. CFD can provide rather detailed, visualized and comprehensive information when compared to analytical and experimental dynamics
b. CFD completely replaces experimental and analytical approaches by providing an alternative cost-effective means of simulating real fluid flows
c. CFD presents the perfect opportunity to study specific terms in the governing equations in a more detailed fashion
d. CFD has the capacity of simulating flow condition that are not reproducible in the experimental tests

Question 4: In CFD, a converged solution is also an accurate solution
a. True
b. False
Question 5: Name the terms in the following equation
u (∂∅)/∂x = τ (∂^2∅)/(∂x^2 ) + S_∅

1 2 3

a. Source term _____
b. Diffusion term _____
c. Convective term _____

Question 6: Pot how many the errors in the equation below (Hint: it is a 3D x-momentum equation for impressible flows)

∂u/∂t+ (∂(uu))/∂x+(∂(vu))/∂x+(∂(uu))/∂z= ∂/∂t [(v+v_T ) ∂u/∂x]+∂/∂y [(v+v_T ) ∂u/∂x]+∂/∂z [(v+v_T ) ∂u/∂x]+(S_u= -1/ρ ∂ρ/∂t+S_u^1.)
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