Drag Plot 2

[Radon_Autodesk]

Hi, Continuing my question before on the meaning of time units in the drag plot, here is an example of what I was saying.

After 10 hours of simulation, I have my time is 00:00:00.19, what does this mean?

Please see the image of the model and the simulation attached

Help please,\

Thank you

[hartogj · Accepted solution]

Hi

I think I covered most of this in a related thread, but I'm copying the info below again in case it's convenient for others.

In short, based on the speed and tunnel length it looks like you have a ways to go on this model based on the amount of simulation time that's been covered. You might consider dialing back the resolution if you've increased it from the default 100%.

Jon

"Flow Design is a transient solver which simulates behavior of flow over time in the wind tunnel. It calculates the behavior at discrete intervals (timesteps) and proceeds from one to the next. The "time" reported in the drag plot is the cumulative amount of simulated time for the simulation. Results tend to approximate steady state conditions after you've covered at least 1 average fluid residence time (tunnel length/wind speed). You'll see the status indicator switch from "Transient" to "Stabilized" when you get beyond this point in time.

The amount of time covered in each step or iteration is dependent upon the model and automatically determined by the solver based on the physics of your setup. You'll notice that some setup conditions (for example, fast flows through short wind tunnels) will cause the solver to use a very small timestep to make sure the behavior is captured."