CODEWITHSUNDEEP
modelicadymolaopenmodelicajmodelica
Gurubasav Yellur
Gurubasav Yellur

Reputation: 21

How to transfer water from cylinder to tank in Dymola?

I've created a Dymola model. It has an empty tank, which is connected to the output of sweptVolume component via a static pipe. Input to the sweptVolume is a constant force, with the help of which I would like to transport water from the hydraulic cylinder to the tank.

I've assumed the cross sectional area of the piston. I've calculated the force that is needed to displace the water in the cylinder assuming the pressure to be atmospheric (101.325kPa). But, somehow I see the water is not getting displaced and the volume is remaining constant without filling the tank.

Please suggest, what type of input should be given for the sweptVolume element (position,move etc.), in case the given input constant force is wrong.

I would like to thank you for your time and interest.

Upvotes: 0

Views: 191

Answers (1)

Marco Romanoni
Marco Romanoni

Reputation: 471

the way to setup initial conditions it is only a matter of GUI, just add "flange(s(start=1, fixed=true))" in add modifiers tab of the sweptVolume parameter dialog in Dymola. To get your model work just invert the sign of the force, the sign convention for the force block is displayed by the arrow, so to compress the piston and fill the tank have to set the const value to minus something. Check the fluid volumes since you will get the model to stop when tank overflows or when piston stroke reaches the end (negative value of s). So you have to setup correctly the forces, or the tank and piston volumes or place some kind of stop to the mechanic part of the piston. The model can work fine even without masses added to the piston.

Hope this helps, Marco

Upvotes: 1

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