Fluids

Fluids

Help with ANSYS Fluent – Mass Flow Rate Issue

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    • mjh0619
      Subscriber
    • Murari Iyengar
      Ansys Employee
      Hi mjh0619
      Can you provide more information about your simulation? On which surface are you monitoring Mass Flow Rate?
    • mjh0619
      Subscriber
      Hey
      I am monitoring from the INLET surface. I am running a transient analysis for a heat transfer problem with a small internal fan (pressure jump) inside. I am using an inlet velocity of 0.1 m/s with a pressure outlet to ambient. Please let me know what other information I can provide.
    • Rob
      Ansys Employee
      If you're monitoring the inlet mass flow, and the inlet velocity is 0.1m/s what should the mass flow be?
    • mjh0619
      Subscriber
      Well, assuming I have a cross sectional area of 0.4 x 0.4 = 0.16 m^2. I have an air density of 1.225 kg/m^3. And a velocity of 0.1 m/s. I would expect it to be about 0.0196 kg/s. I am hoping this answers your question?
    • mjh0619
      Subscriber
      I have never ran a simulation where the mass flow was so straight before! Maybe I am overthinking it?
    • Rob
      Ansys Employee
      If you're monitoring a fixed flow boundary the results tend to be fairly constant. Check the inlet area in Fluent too.
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