Can I simulate a mixing of Same Fluids? (i.e Incoming fluid into a Vessel which is already filled with the same fluid).
Can I tell the software that the vessel is already filled with fluid??
You can define the initial condition as a given fluid. Then your injection point would have the same fluid. It is simplest if you copy the fluid properties and make another version (e.g. Air 2). This makes it easier to track the progress of the mixing or monitor the composition of exiting fluids (like if you are trying to determine exchange rates).
can you explain more please ?
why I cant use subdomain ?
Subdomains are for when you want to separate 2 different fluids in different parts of the model.
It seems like you need to work through the tutorials to understand the basic operation of Flow Simulation, this is pretty straightforward if you've learned the basics.
When you set the initial condition it automatically fills all fluid space with the defined fluid. If you have multiple fluids included it adds a Concentration tab to define how much of each is initially present.
You simply copy a pre-defined fluid, and paste a copy in the User Defined section, then change the name so you can track them separately.
thank you very much
I real appreciate your help.
I have created water and water 2
what is the next step ?
In the Initial Conditions, set your fluid as pure water. Then define your inlet boundary condition and set that as pure "water 2".
So I make Water to be the default fluid.
Yes, if you make water the default then it defines the fluid cells as containing water. Then when you set your boundary condition as water 2 it calculates how they mix and interact.
You could also make water 2 the default and then use water as the boundary condition. Whichever is easier for you to understand or present to others.
and use concentrations of water 1 and water 2 to determine how well things are mixing
as long as there an outlet, yes you can do this. the copied fluid will let you track how things are mixing.
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