Answered

How can i give more accurate initial conditions ?

The pump module has no input (velocity or torque) at the shaft. The system of equations is missing conditions needed to start t...

How can i give more accurate initial conditions ?

The pump module has no input (velocity or torque) at the shaft. The system of equations is missing conditions needed to start t...

2 months ago | 0

Answered

What causes the pressure behavior in valves?

Hi Michael, I think there are a couple things at play here: First, there is currently no volume at all between the two reservo...

What causes the pressure behavior in valves?

Hi Michael, I think there are a couple things at play here: First, there is currently no volume at all between the two reservo...

2 months ago | 0

Answered

Why the volumic flow rate sensor (motion air) is registering a negative value?

As @VBBV mentioned in the comment, switching the A/B port is likely the solution. Is this turbine block the same one as in theA...

Why the volumic flow rate sensor (motion air) is registering a negative value?

As @VBBV mentioned in the comment, switching the A/B port is likely the solution. Is this turbine block the same one as in theA...

2 months ago | 0

Answered

Simscape fluids and Ansys CFX

Hi Federico, For the block you mentioned, tabulated data or polynomial coefficients (which will require some data fitting) are ...

Simscape fluids and Ansys CFX

Hi Federico, For the block you mentioned, tabulated data or polynomial coefficients (which will require some data fitting) are ...

2 months ago | 1

| accepted

Answered

Recursive type equation solution in simscape

Feels like you are trying to use Simscape like MATLAB :p, by considering how to use iterations to do the numerical integration. ...

Recursive type equation solution in simscape

Feels like you are trying to use Simscape like MATLAB :p, by considering how to use iterations to do the numerical integration. ...

2 months ago | 0

Answered

air-oxygen mixing model in a continuous process

You should be able to use the Moist Air (MA)domain for such a purpose. The domain keep tracks of the concentration, mass, and e...

air-oxygen mixing model in a continuous process

You should be able to use the Moist Air (MA)domain for such a purpose. The domain keep tracks of the concentration, mass, and e...

2 months ago | 0

Answered

Problems with Organic Rankine Cycle Simulation

If you are new to Simulink and Simscape, consider the free, interactive tutorials known as the Onramps first. Simulink Onramp: ...

Problems with Organic Rankine Cycle Simulation

If you are new to Simulink and Simscape, consider the free, interactive tutorials known as the Onramps first. Simulink Onramp: ...

2 months ago | 1

| accepted

Answered

How to connect elements form different simscape sub-libraries?

I believe you may use two orifices to achieve what you have described. Just control the input area to each to adjust the amount...

How to connect elements form different simscape sub-libraries?

I believe you may use two orifices to achieve what you have described. Just control the input area to each to adjust the amount...

2 months ago | 0

Answered

How to use Simscape to solve heat conduction equation?

I guess by "wrong results" you mean the measured heat flow rate doesn't make sense? I noticed you connected the heat flow rate ...

How to use Simscape to solve heat conduction equation?

I guess by "wrong results" you mean the measured heat flow rate doesn't make sense? I noticed you connected the heat flow rate ...

2 months ago | 0

Answered

I get the following error; "Caused by: Variable 'fan_area' has been deleted from base workspace." in Simscape

The parameters of this model are all kept in the Simulink model workspace. So the fact that it's looking for things in the base...

I get the following error; "Caused by: Variable 'fan_area' has been deleted from base workspace." in Simscape

The parameters of this model are all kept in the Simulink model workspace. So the fact that it's looking for things in the base...

2 months ago | 0

Answered

Modeling of a bypass valve in the two-phase structure

If "opening fraction is zero throughout" and the valve let through a significant fraction of the total mass flow, you have too m...

Modeling of a bypass valve in the two-phase structure

If "opening fraction is zero throughout" and the valve let through a significant fraction of the total mass flow, you have too m...

2 months ago | 0

Answered

How can I implement vanes (IGVs) on compressor unit in Simscape?

You are right about the compressor block: it doesn't support vanes as an input. I can think of one workaround, by using a 3D lo...

How can I implement vanes (IGVs) on compressor unit in Simscape?

You are right about the compressor block: it doesn't support vanes as an input. I can think of one workaround, by using a 3D lo...

2 months ago | 0

Answered

how can i get the specific heat at constant volume for two phase fluid Water/Steam

Hi Mario, You should be able to calculate Cv from Cp, temperature, thermal expansion coeffcient, density, and bulk modulus. Al...

how can i get the specific heat at constant volume for two phase fluid Water/Steam

Hi Mario, You should be able to calculate Cv from Cp, temperature, thermal expansion coeffcient, density, and bulk modulus. Al...

2 months ago | 0

Answered

Is it possible to calculate the "hydraulic-translation-multibody"-system backwards?

I would agree with you that the valve position couldn't be calculated the way you described. The force, though, can be found by...

Is it possible to calculate the "hydraulic-translation-multibody"-system backwards?

I would agree with you that the valve position couldn't be calculated the way you described. The force, though, can be found by...

2 months ago | 0

Answered

Variable Kv valve model

My suggestion would be to modify the code of a local restriction block, and move the Discharge Coefficient (Cd) from "parameter"...

Variable Kv valve model

My suggestion would be to modify the code of a local restriction block, and move the Discharge Coefficient (Cd) from "parameter"...

2 months ago | 0

Answered

Pressure-flow characteristic for a 4-Way Directional Valve

I believe the pressure differentials refer to p.P-p.A, p.P-p.B, p.A-p.T, p.B-p.T. The flow direction is defined in the save way...

Pressure-flow characteristic for a 4-Way Directional Valve

I believe the pressure differentials refer to p.P-p.A, p.P-p.B, p.A-p.T, p.B-p.T. The flow direction is defined in the save way...

2 months ago | 0

Answered

How to add radiation heat transfer to 3-Zone Pipe (2P) ?

This may be a workaround: May the convective transfer coefficient in the 3-zone pipe ridiculously large, so it results in almos...

How to add radiation heat transfer to 3-Zone Pipe (2P) ?

This may be a workaround: May the convective transfer coefficient in the 3-zone pipe ridiculously large, so it results in almos...

2 months ago | 0

Answered

How do I change the default settings (water) in Thermal Liquid (TL) Settings in my Simulink model?

Use the Thermal Liquid Settings block in Simscape / Foundation Library / Thermal Liquid / Utilities: https://www.mathworks.com/...

How do I change the default settings (water) in Thermal Liquid (TL) Settings in my Simulink model?

Use the Thermal Liquid Settings block in Simscape / Foundation Library / Thermal Liquid / Utilities: https://www.mathworks.com/...

2 months ago | 0

Answered

Heat Excahnger TL Modeling Liquid Cooling

Looks like a follow-up on question https://www.mathworks.com/matlabcentral/answers/1624290-simulink-thermal-liquid-simulation?s_...

Heat Excahnger TL Modeling Liquid Cooling

Looks like a follow-up on question https://www.mathworks.com/matlabcentral/answers/1624290-simulink-thermal-liquid-simulation?s_...

2 months ago | 0

Answered

Simulink Thermal liquid simulation

Hi Jan, There are a few things that need attention in your model: use of "absolute reference" blocks: this block prescribes an...

Simulink Thermal liquid simulation

Hi Jan, There are a few things that need attention in your model: use of "absolute reference" blocks: this block prescribes an...

2 months ago | 0

Answered

Aggregate Equivalent Length of Local Resistances (AELoLR) Simscape hyd. Pipes

Hi Michael, This parameter is there to add some length to the pipe only in the equations that calculate the friction loss, see ...

Aggregate Equivalent Length of Local Resistances (AELoLR) Simscape hyd. Pipes

Hi Michael, This parameter is there to add some length to the pipe only in the equations that calculate the friction loss, see ...

2 months ago | 0

Submitted

Intro-Examples-for-Simscape-CN

Model and scripts from video series on Simcape physical modeling

2 months ago | 14 downloads |

Answered

Equations for Simscape component Pipe (2P)

The blending happens in lines 324-327 (R2022a): % Smooth transition for heat transfer coefficient between liquid, mixture, ...

Equations for Simscape component Pipe (2P)

The blending happens in lines 324-327 (R2022a): % Smooth transition for heat transfer coefficient between liquid, mixture, ...

3 months ago | 0

Answered

The model of the dehumidifier based on the Peltier element

Looks like a parametrization issue here. In the provided model, the peltier device has ~600Amp going through, and that's a lots...

The model of the dehumidifier based on the Peltier element

Looks like a parametrization issue here. In the provided model, the peltier device has ~600Amp going through, and that's a lots...

3 months ago | 0

Answered

It is possible to export a simscape fluid model to FMU?

If you can bring your Simscape model to fixed-step & fixed-cost (see this Doc page), you should then be able to generate a stand...

It is possible to export a simscape fluid model to FMU?

If you can bring your Simscape model to fixed-step & fixed-cost (see this Doc page), you should then be able to generate a stand...

3 months ago | 0

Answered

specify the mass of fluid in a closed system in Simscape

This question may give you some hints on heat pipe. Regarding the total mass in a closed system, you may run the model for a ve...

specify the mass of fluid in a closed system in Simscape

This question may give you some hints on heat pipe. Regarding the total mass in a closed system, you may run the model for a ve...

3 months ago | 0

Answered

I think there is an error in the documentation or code of the variable local restricion (2P) of the simscape two-phase domain.

Typo in the Documentation. Expected to be fixed in future releases and updates. THANKS for pointing it out!!

I think there is an error in the documentation or code of the variable local restricion (2P) of the simscape two-phase domain.

Typo in the Documentation. Expected to be fixed in future releases and updates. THANKS for pointing it out!!

3 months ago | 0

| accepted

Answered

Two component (liquid+gas) simulation

For the first case (air carrying liquid droplets), it MAY be possible to use MA domain and use the trace gas part of the model t...

Two component (liquid+gas) simulation

For the first case (air carrying liquid droplets), it MAY be possible to use MA domain and use the trace gas part of the model t...

3 months ago | 1

Answered

Simscape: thermal liquid pump

In newer versions of Simscape Fluids, there are more pump modules available. In general, the pump can be modeled by using look...

Simscape: thermal liquid pump

In newer versions of Simscape Fluids, there are more pump modules available. In general, the pump can be modeled by using look...

3 months ago | 1

Answered

Is there a simple model of temperature rise with time available for an internally heated tank losing heat to an ambient environment?

Something like this, with right parameters (which is usually the hard and time consuming part).

Is there a simple model of temperature rise with time available for an internally heated tank losing heat to an ambient environment?

Something like this, with right parameters (which is usually the hard and time consuming part).

3 months ago | 0