- #1

Urmi Roy

- 753

- 1

Could someone help me answer a couple of questions?

1. So if a thermal boundary layer forms in a 'plug flow' model i.e. when there is no momentum b.;ayer formation, the temperature near the surface assumes a parabolic profile.

However,

**how does the formation of a momentum b.l affect the thermal b.l? Do they form independent of each-other?**

2. In a thermal boundary layer,

**why is it that we define the thickness of the boundary layer as the thickness required to get a (T-Ts)=0.99*T∞**where Ts=surface temperature; T=temp at ∂t and T∞ is free stream temperature.

**(in momentum bl, boundary layer thickness is when velocity becomes 0.99*U∞)**