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# Yifeng Tang

### MathWorks

Last seen: Today Actif depuis 2020

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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. ...

1 jour il y a | 0

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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...

1 jour il y a | 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 ...

15 jours il y a | 0

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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...

22 jours il y a | 0

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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 ...

22 jours il y a | 0

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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...

22 jours il y a | 0

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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...

22 jours il y a | 0

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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...

28 jours il y a | 0

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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...

28 jours il y a | 0

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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...

28 jours il y a | 0

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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:

29 jours il y a | 0

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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...

environ un mois il y a | 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...

environ un mois il y a | 0

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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...

environ un mois il y a | 0

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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...

environ un mois il y a | 0

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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...

environ un mois il y a | 0

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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,...

environ un mois il y a | 0

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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...

environ un mois il y a | 0

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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...

3 mois il y a | 0

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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...

3 mois il y a | 0

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Evolving 'Aggregate Equivalent Length of local resistances' within a simulation?
Since you have access to the Simscape code of this block, you may make the 'Aggregate Equivalent Length of local resistances' no...

4 mois il y a | 0

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How can I move a double acting cylinder by force?
I believe it's because of the force sensor you have on top of the picture. A force sensor needs to be placed in line with the a...

4 mois il y a | 0

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Modeling condensation on walls using Simscape Moist Air
Starting R2022b, the Pipe block in the Moist Air domain contains the "Effect of Condensation on Wall Surface". It's different f...

4 mois il y a | 1

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Thermal Liquid Tank in simscape
I don't think there is a more easy or efficient way in your case. In the latest version of Simscape, however, you can get up to...

4 mois il y a | 0

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Is it possible to create Packed bed thermal model in simscape?
Attempt to answer from 4 years later ... (1) I think the easiest way is to use a Pipe block. Attach the right amount of therm...

4 mois il y a | 0

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SimHydraulics - double centrifugal pump
The centrifugal pump block is available in Simscape Fluids for the Hydraulic domain since R2007a and for the newer Isothermal Li...

4 mois il y a | 1

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Pressure in a closed thermal liquid system
You'll need a "tank" to stablize this. What happens is that the density of the fluid is a function of pressure and temperatur...

4 mois il y a | 0

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I have confusion in Simscape Co2 transcritical system example. How you had designed compressor i dont get it and why you used PS LOOK UP TABLE 2D IN COMPRESSOR. Do i need a specific date to run this
The 2D LUT and an ideal flow rate source is to represent the BEHAVIOR of a compressor. If the pressure ratio (outlet/inlet) ris...

4 mois il y a | 0

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Looking for the base model of the counter balance valve
comment from 8 years later, lol. I don't think you can access the source code behind the blocks in Simscape Fluids (new product...

4 mois il y a | 0

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SimHydraulics "Failed to solve using iteration matrix. Initial conditions solve failed to converge."
Force sensor should be placed inline with there the force passes through, just like measuring a current. The force sensor in yo...

4 mois il y a | 0