friction drag उदाहरण वाक्य

The calculated friction drag D _ f utilizes the x-projection of the viscous stress tensor evaluated on each discretized body surface.
The reason the ruler on the table spins is because friction drags the other end back in the opposite direction, creating a force couple.
Importantly for aeronautics, Prandtl's theory can be applied directly to streamlined bodies like airfoils where, in addition to surface-friction drag, there is also form drag.
There are two ways to decrease friction drag : the first is to shape the moving body so that laminar flow is possible, like an airfoil.
The equivalent skin friction coefficient accounts for both separation drag and skin friction drag and is a fairly consistent value for aircraft types of the same class.

Like other types of reels, spin cast reels are frequently fitted with both anti-reverse mechanisms and friction drags, and some also have level-wind ( oscillating spool ) mechanisms.
"' Skin friction drag "'is a component of profile drag that occurs differently depending on the type of flow over the lifting body ( laminar or turbulent ).
To reduce this drag, either the flow separation could be reduced or the surface area in contact with the fluid could be reduced ( to reduce friction drag ).
The major significant factor is friction drag, which is largely dependent upon the wetted area, the surface smoothness of that area, and the presence of any discontinuities in the shape.
For a well designed aircraft, zero-lift drag ( or parasite drag ) is mostly made up of skin friction drag plus a small percentage of pressure drag caused by flow separation.