Question

For flow of viscous fluid over a flat plate, if the fluid temperature is the same as the plate temperature, the thermal boundary layer is

• A.
  thinner than the velocity boundary layer is
• B.
  thicker than the velocity boundary layer
• C.
  of the same thickness as the velocity boundary layer
• D.
  not formed at all

Answer 1

The correct option is D

not formed at all
Thermal boundary layer is only formed whenever there will be temperature difference between plate and the fluid hence thermal boundary layer is not formed at all for given condition.