Which of these approaches is not used to find the solution of the fully viscous flowfield in hypersonic flow?

Boundary-layer solution

Full Navier-Stokes equation

Viscous shock-layer solutions

Parabolized Navier-Stokes solution

Correct Answer : Boundary-layer solution

Explanation : In analyzing the hypersonic flow, it is assumed that the flow is viscous throughout. There are three main approaches taken which are-Viscous shock-layer solutions, parabolized Navier-Stokes solution and full Navier-Stokes equation. These three equations are much more accurate than the boundary-layer equations in order to solve the fully viscous shock layer present over the blunt body in a hypersonic flow.

Recently Updated in Aerodynamics Questions

Which of these laws is used to find the heat flux at a point in the fluid?

Fourier law

Fick�s law

Kepler�s law

Newton�s law

Correct Answer : Option (A) : Fourier law

Explanation : Fourier law which is also known as the law of heat conduction is used to find out the heat flux at any point in the fluid. It is given by the formula:

Where, heat flux is in the y – direction
Minus sign indicates that the heat flows from high temperature to low temperature and thus q?_y is in opposite direction to the temperature gradient.

What happens to the shear stress if the thickness between the two plates is increased in a Couette flow?

Increases

Decreases

Remains same

Becomes infinite

Correct Answer : Option (B) : Decreases

Which of these laws is obeyed by a Newtonian fluid?

Prandtl law

Newtonian law

Shear stress law

Incompressible fluid law

Correct Answer : Option (C) : Shear stress law

Explanation : Newtonian fluids are characterized by those fluids that obey the shear stress law. Aeronautics domain makes use of newtonian fluids only (air, other gases). Those fluids that don’t obey shear stress law are known as non – newtonian fluids (blood).