Create the Output Requests

Create output requests to collect pressure, flow velocity, and mass flow results while the simulation iterates.

The app automatically creates an output request for the whole model when you create a simulation scenario. By modifying this output request, you can filter the volume of data produced during a simulation. You can also create output requests to collect pertinent variable data for particular supports.

In this example, you create one output request for each duct opening. The output request for the duct inlet collects pressure and mass flow results, while the output request for the duct outlet collects flow velocity and mass flow results. You use this information to confirm that the simulation converged properly and to analyze the duct's performance.

This task shows you how to:

View the Existing Default Output Request

  1. Click Output Requests in the Assistant.
  2. From the tree, expand Scenario > Flow Analysis Case.1 > Output Requests (1), and double-click Output.1.

    The output frequency field, n, is set to write output every 100,000 increments. When this value is greater than the maximum number of iterations defined in the steady-state step, the simulation requests output data for the whole model at the last increment only (that is, the convergence point). When the value is less than the maximum number of iterations, the simulation requests data at the specified frequency. Requesting output in short intervals is useful when analyzing data over time is important.

  3. Click OK.

Create Additional Output Requests

  1. Create an output request for gauge pressure and mass flow at the duct inlet.
    1. From the Output Requests section of the Assistant, click Output .
    2. Name the request Output_Inlet.
    3. Select Opening.1 as the support.
    4. From the Output group list, select History.
    5. Expand Flow, and select AVGPRESSGAU and MASSFLOW to request output.
    6. Click OK.
      The app records the gauge pressure and mass flow at the duct inlet at each increment.
  2. Similarly, create an output request named Output_Outlet for flow velocity (AVGVEL) and mass flow (MASSFLOW) at the duct outlet.