Turbulent flow over a flat plate occurs at a Reynolds number

Turbulent flow over a flat plate occurs at a Reynolds number greater than 500,000, in a conduit it can be expected to occur at Reynolds numbers greater than 3000, while turbulent flow in an open channel occurs for Reynolds numbers greater than 750, True or false? What are the names of the governing equations describing fluid flows in which pressure, density, the three Cartesian velocity components and temperature are unknowns?

Solution

13) False, turbulent flow occurs roughly when Reynolds number > 4000 iirespective whether it is a flow over a flat plate or in a open channel.

14) There are three governing equations in fluid Flow

      a) Mass conservation equation also known as continuity equation

      b) Momentum conservation equation known as navier stokes equation

      c) Energy conservation equation in fluid flow.