[williamsj0165]

Hello all, I have what should be a relatively simple question. I am simulating the flow over three cylinders to observe the vortex shedding. I am currently using a constant inlet velocity, but I would now like to increase the inlet velocity over time.

In 0/U, I currently have the code:

inlet
    {
        type            uniformFixedValue;
        uniformValue    constant (1 0 0);
    }

outlet 
    {
        type            pressureInletOutletVelocity;
        inletValue      uniform (1 0 0);
        value           uniform (1 0 0); 
    }

In order to increase the inlet velocity over time, I believe I will modify "inlet" as e.g.

inlet
    {
        type            uniformFixedValue;
        uniformValue    table
        (
            (0    (1 0 0))
            (5    (2 0 0))
            (10    (3 0 0))
        );
    }

My question is this – do I need to make a similar modification to outlet? It would just be this simple?

outlet 
    {
        type            pressureInletOutletVelocity;
        inletValue      table
        (
            (0    (1 0 0))
            (5    (2 0 0))
            (10    (3 0 0))
        );
    }

Thank you in advance for any comments or insights!

[williamsj0165]

I have got the simulation running by modifying outlet as such:

    outlet 
    {
        type            pressureInletOutletVelocity;
        inletValue      table
        (
            (0    (1 0 0))
            (15    (2 0 0))
            (30    (3 0 0))
        );
        value           uniform (1 0 0); 
    }

This feels naive to me, so we'll see what the simulation looks like once it finishes.