If a flow variable ϕ can be resolved by spatial LES filtering as Φ and Φ’. Expand the term \(\rho\overline{u_iu_j}\).

\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)

\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{u_i^{‘}u_j^{‘}}\)

\(\rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)

\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}+\rho\overline{u_i^{‘}u_j^{‘}} \)

Explore topic-wise MCQs in Computational Fluid Dynamics Questions and Answers.

This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.	If a flow variable ϕ can be resolved by spatial LES filtering as Φ and Φ’. Expand the term \(\rho\overline{u_iu_j}\).
A.	\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)
B.	\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{u_i^{‘}u_j^{‘}}\)
C.	\(\rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}\)
D.	\(\rho\overline{\overline{u_i}\overline{u_j}} + \rho\overline{\overline{u_i}u_j^{‘}} + \rho\overline{u_i^{‘}\overline{u_j}}+\rho\overline{u_i^{‘}u_j^{‘}} \)
Answer» E.

Discussion

2.	The stress term \(\rho\overline{u_i^{‘}u_j^{‘}}\)is called as ____________
A.	Filter Reynolds stress
B.	LES Reynolds stress
C.	Reynolds stress
D.	Sub-Reynolds stress
Answer» C. Reynolds stress

Discussion

Explore topic-wise MCQs in Computational Fluid Dynamics Questions and Answers.

If a flow variable ϕ can be resolved by spatial LES filtering as Φ and Φ’. Expand the term \(\rho\overline{u_iu_j}\).

The stress term \(\rho\overline{u_i^{‘}u_j^{‘}}\)is called as ____________