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Flow without a channel (outlet)

Posted 2 juin 2016, 13:58 UTC−4 Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.0 1 Reply

Gabriel Robaina
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I am having trouble modeling a flow in which there is no defined outlet. For example, imagine 2 hair dryers perpendicular to each other blowing air to a plate. There is an inlet, hair dryer's nozzle, but there is not an specific outlet because its an open system, without a channel for the fluid to flow.

I tried to model that using many outlets instead of not pointing any, but it did not work for laminar flow. Should I use turbulent flow instead? Which type? If the air being blew is cooling the plate, which boundary should be the outflow?

Thanks.
1 Reply Last Post 23 juin 2016, 16:37 UTC−4
Gabriel Robaina
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Posted: 8 years ago 23 juin 2016, 16:37 UTC−4
I could figure out some of the problems we were having, but even though I ask for 5 minutes of time-dependent analysis, the solver stops on 0.2235123s without giving any error message or anything. I believe the physics are right but I am not entirely sure. We were using a time step of 1 second, and maybe it is too big. We are testing with a new, smaller, time step. Can anyone help with that problem?
I could figure out some of the problems we were having, but even though I ask for 5 minutes of time-dependent analysis, the solver stops on 0.2235123s without giving any error message or anything. I believe the physics are right but I am not entirely sure. We were using a time step of 1 second, and maybe it is too big. We are testing with a new, smaller, time step. Can anyone help with that problem?

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