pressure error after adding pipes to the simscape model

I am modeling a thermal management system in SimScape, my model includes heat pumps, heat exchangers, gate valves(TL),Centrifugenal pumps (TL), T junctions(TL), cross junctions(TL), and tanks,... and the coolant is thermal liquid. Previuosly these blocks were connected to each other directIy using the addline function. The model was working fine before, recently I added pipes(TL) blocks to the interconnections and I am getting this error for some of the pipes and all of the valves in my model at t=0.000:

"At time 0.000000e+00, one or more assertions are triggered. Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from: Block path: "....""

I already tried increasing the pumps speed from 1000 RPM to 10000 RPM

decreasing the pipe length from 0.5m to 0.2 m (cross section area) =0.01 m^2

setting the pipe wall to flexible and rigid.

the Fluid dynamic compression and the Fluid inertia in pipe model is on.

can anyone suggest how I can debug this problem?

[Raj]

Can you please attach the whole error message you are facing for us to understand the issue better?

Answer 1

[Reihaneh Jahedan]

This is the error, I didn't include it cause it was too long:

"An error occurred while running the simulation and the simulation was terminated

Caused by:

['Arch120240318T012543961/Heat Pump/TXV/Solver Configuration']: At time 0.000000e+00, one or more assertions are triggered. See causes for specific information.

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe33/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe34/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe35/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe36/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe37/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe38/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe39/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe40/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe41/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe42/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe43/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe44/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe45/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe46/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe47/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe48/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe49/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/Pipe50/Pipe

Assert location:

o (location information is protected)

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve1/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve10/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve11/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve12/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve13/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve14/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve15/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve16/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve17/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve18/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve2/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve3/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve4/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve5/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve6/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve7/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve8/Gate Valve (TL)

Assert location:

o (location information is protected)

Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:

Block path: Arch120240318T012543961/valve9/Gate Valve (TL)

Assert location:

o (location information is protected)

"