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# Yifeng Tang

### MathWorks

Last seen: 1 dag ago Active since 2020

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Calculating Work done by a Closed Cylinder in Simulink and Simscape
You mentioned that you are using Simscape for the simulation of the cylinder. If that is indeed the case, I believe it would be...

3 dagen ago | 0

What causes the pressure to be different in the shown figure when I use flow divider which must be dividing the flow equally?
The pressure sensor is an across variable sensor and no flow will go through the block. So your motor isn't getting any fluid t...

3 dagen ago | 0

Which blocks could I use to model a hydraulic turbine in Simscape?
Some ideas: This hydraulic motor may be useful, though I suspect the shape of its performance curve may not be like that of a t...

15 dagen ago | 0

TL pressure Keep descending until the error is reported below the minimum effective value in matlab "official example of heat pump"
It's a model problem, in my opinion, meaning some important feature is missing from the model. In this case, some type of tank ...

29 dagen ago | 0

Does simscape two-phase element "2P pipe" allows constant temperature , constant pressure and constant mass flow rate as inputs?
The source block is only responsible of driving a flow. The states, temperature and/or pressure, are set mainly by the conditio...

ongeveer 2 maanden ago | 0

Pump system Thermal Liquid Modeling for Liquid Cooling
I noticed that the sensors in the model appear to be placed incorrectly. For through variable (flowrate, current, heat flux) ...

ongeveer 2 maanden ago | 0

Hydraulic Actuators in Series
There is a setting in the converter block about whether pressure in the volume causes the R port to move in positive or negative...

ongeveer 2 maanden ago | 0

Blower modeling in Simscape
In both the Gas and Moist Air domains, there is a Fan block you may try to use to model a blower. If Gas domain is sufficient f...

ongeveer 2 maanden ago | 0

Create a blockage in a pipe and simulate in Simulink
HI Adeyemi, The easiest thing to do is to use a Variable Local Restriction and closes it when you want the blockage to occur. ...

ongeveer 2 maanden ago | 0

positive displacement compressor (G) for simulating roots blower
Looks like this positive displacement compressor would be the right choice. A roots-type blower indeed works by trapping a fixe...

ongeveer 2 maanden ago | 0

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SimScape Tank (G-TL) - Liquid below inlet height error
This error is saying your liquid level is too low. Since it happened after the simulation has run for 22 secs, either too much ...

2 maanden ago | 0

Variable 3-way Proportional Control Valve flow rate and pressure drop
I would recommend using the parameter estimation workflow. You'll like need the Optimization Toolbox and the Simulink Design Op...

3 maanden ago | 0

How to use Temperature control valve (TL) in Simscape properly?
I saw mass flow rate sources in your model right before the control valve. The source will force the prescribed amount of flow ...

3 maanden ago | 0

how can i install seawater properties inside two phase-fluid properties ? simscape
If you have access to Simscape Fluids, an add-on library for Simscape, there is a Thermal Liquid Properties (TL) block, where se...

3 maanden ago | 0

Using a centrifugal pump in a two-phase (2P) fluid in Simscape
It's possible to build a model for CP to reproduce much of its behavior. If you can build a 2D table from reference data for th...

3 maanden ago | 0

Where would I find properties of steam, to use in the gas properties block in simscape?
I would assume you are using the Gas domain to model your system and try to use different Gas Property block to switch the worki...

3 maanden ago | 0

Simscape gas pipe acoustics
You are probably right that you'll need the gas inertia modeled to capture the quick oscillation of pressure as the results of s...

3 maanden ago | 0

Modeling of a system with mixture of two gases on Simscape
You may use the Moist Air (MA) domain and set the properties to the gases you'd like to mix. If either species may condense, yo...

3 maanden ago | 0

How to simulate the conductive heat transfer due to the pipe wall thickness using the Pipe (TL) block from the Simscape Fluids library?
You are VERY close. Try either of the following, depending on what type of heat source your have:

3 maanden ago | 0

Nonconservation of energy when using system-level heat exchanger
I downloaded the model and noticed the flowrate on the right is very large. As you are still using the default port size (0.01m...

3 maanden ago | 0

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Is there a block available for storing the Moist Air, which displays the Volume filled in it? If not How can I design/modify existing one?
I would suggest you try with the Translational Mechanical Converter (MA) block. The volume can be calculated by measuring the po...

3 maanden ago | 0

i need to model this pneumatic cycle using Simscape
The A-port of the two-way direction valve is connected to Pressure sensor, which allows no flow, so no flow can occur in this ne...

3 maanden ago | 0

Calculate heat capacity for R134a
If you really want, you can use the data in r134aPropertyTables.mat to calculate the cp for both the liquid and the vapor phases...

3 maanden ago | 0

how can i get the value of specific enthalpy at the reference temperature in block of gas properties?
Hi Jiseung, I believe that parameter is just to specify a reference point (like 0 degC on temperature scale) for the specific e...

3 maanden ago | 0

Centrifugal Pump (IL) as a Centrifugal Turbine (IL)
Interesting idea, but I doubt it would work. For compressors, the flow runs through and pressure increases, while for turbines,...

3 maanden ago | 0

Is pipe elevation taken away from pipe lenght?
the pipe length and cross section area defines its geometry (volume, heat transfer area, etc.) while the elevation provides a wa...

3 maanden ago | 0

sh_cyl_counterbalance_valve example: artificial results when 0 input?
Hi Chris, I tried to make Load and Flow Rate blocks zero and seem to get what you saw as well. Look like the initial "spike" co...

5 maanden ago | 0

4-way directional valve from matlab simscape calculates volume flow incorrectly.
The flow rate sensor that is supposed to measure the flow rate out of Port A, appears to have a branch before it, which allows t...

5 maanden ago | 0