Two fluid flow patterns are ______ and ______ . Reynolds number can be used to judge the flow pattern. The expression of Reynolds number in circular pipe is Re=______ . And the corresponding critical value of Re is ______ .
The force acting on the fluid can be divided into two types, including ______ and ______ .
What kind of approach can be used to describe fluid flow in fluid dynamics?
A. Lagrangian approach
B. Reynolds approach
C. Bernoulli approach
D. Eulerian approach
In approximate models, ( ) is widely used in model experiments about oil flow.
A. Froude model
B. Reynolds model
C. Euler model
D. Complete similitude model