CFD simulation of agitation tank

[are_peace86]

Hi all ,

according to this situation currently we are facing right now , im require to conduct simulation of flow of mixing propeller in tank . I dont know how to put boundry condition of that simulation , i am hoping that profesional user like you all can help me in order to give me proper method to conduct this simulation . 

Attach below is actual application on how it work ; 

Objective:

To simulate whether solvent + powder are well mixed in good circulation, without stagnant zone

at room temperature

No heat, no surface wave calculation are needed.

Pour all ingredients inside tank and then mix using propeller.

Batch mixing, constant level, fix volume.

After mix, will transfer to another tank.

Tank dimension:

Long tank: 4m (L) x 2.5m (W) x 4.5m (H)

Round tank with con shape in bottom: 3m (D) x 5m (H), bottom con 0.5m

Parameter changes / variables:

1. Tank size and shape varies

2. Propeller diameter, blade angle and shape varies

3. Propeller rotation speed varies (normally from 300 rpm to 10 rpm)

4. Liquids viscosity (300mpa) and density (1.05 sg) - solvent + powder mixing

[apolo_vanderberg]

There would be no boundary conditions for this specifically.

Look at rotating regions as you'll need that to represent the motion of the impeller.

With that alone you could look at LMA /Water Age result quantity to see where stagnant regions lie.

If you really wanted the powder in there, you'd then have to combine that with Scalar.

To start i'd say try just with rotating region.

[are_peace86]

Hi ,

Thanks for your advice , so that you mean is just focus on rotating region right ? so i just focus on the region without assigning any boundry condition.attach here is my design concept ,i didnt know how to create rotating region . Can you give me any relate tutorial to conduct that simulation . Thanks for helping

[apolo_vanderberg]

Please go read the Help section on Rotating Regions as we talk about many of the basics.

Attached is an image of what you'll need.

As I mentioned focus on the fluid side, the powder can be dealt with later.

This means  you need

Inlet flow

2 Rotating Regions (or 1 that encompasses the entire rotating shaft/blade assembly)

Outlet pressure where fluid comes out

[are_peace86]

Hi sir 

Thanks for helping , i will try to conduct refering to your method sir.thanks

Regard

Mohd Hafiz 

[are_peace86]

Hi ,

attach here is sample file of agitation tank , i just assign the rotational region but it does not work properly . any one please help me , im stuck already to start the simulation

Best Regard,

Mohd Hafiz