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Spray dryers velocity

  1. Nov 6, 2007 #1
    Hello everybody, I'm new here.

    I'm working with spray driers and I need to know how does the velocity descent affect to the process.

    Can you help me?

    I need to know how the variables affect and the consequences.

    Thank you very much
  2. jcsd
  3. Nov 6, 2007 #2


    User Avatar

    Staff: Mentor

    One needs to elaborate more on the process. For example, what fluid is being sprayed, and on to what is it sprayed.

    In general, as the velocity of a fluid (e.g. water, air, gas, . . .) involved in forced convection increases, the heat transfer coefficient improves. Often the heat transfer coefficient is correlated with the Reynolds and Prandtl numbers, or the Nusselt number.

    If it's a drying process, then humidity of a gas would be important.

    If it involves a vortex separator, then the centrifugal force increases with velocity, and that would improve separation of liquid drops from a gas.

    It's difficult to offer any information without more specifics, e.g. temperature, pressure, mass flow rate, phases, . . . .
    Last edited: Nov 6, 2007
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