[adilsyyed]

In cold flow simulation, the user is required to make a valve lift profile in the form of a *.prof file corresponding to different crank angles. I already made mine and it works like a charm. No problems there.

But, according to ANSYS documentation,

This file essentially contains the valve lift values at different crank angles. It can also include the piston motion profile. You can use this profile file to animate the movement of the valves. It is also used for simulating the valve motion.

However, I couldn't find any way of relating piston lift-values with crank angles in the *.prof file. I am wondering if anyone has an idea.

Note: By default ANSYS Fluent assumes 0 crank angle at TDC and starts simulation from there.

[leofengxp]

could you share your profile file, because I don't quite understand the matrix for angle and lifting settings.

[adilsyyed]

Originally Posted by leofengxp

could you share your profile file, because I don't quite understand the matrix for angle and lifting settings.

Do you mean the valve lift profile?

You can get a detailed explanation of the valve lift profile file on
https://www.sharcnet.ca/Software/Ans...setup_ice.html

If you still need the profile file, let me know.

[Lukman]

Originally Posted by adilsyyed

Do you mean the valve lift profile?

You can get a detailed explanation of the valve lift profile file on
https://www.sharcnet.ca/Software/Ans...setup_ice.html

If you still need the profile file, let me know.

Good morning, please I'm working on cold simulation. Please I need a sample of how to compose the the valve lift and piston motion profile

[adilsyyed]

Originally Posted by Lukman

Good morning, please I'm working on cold simulation. Please I need a sample of how to compose the the valve lift and piston motion profile

I couldn't get anything on piston motion profile, however, you can make your lift profile to match ANSYS default piston profile, i.e. it starts its 0 crank angle from power stroke.

I would share my lift profile and corresponding graph of piston motion when I can (Not at home right now). But it you can explain your problem, I could guide you better.

[adilsyyed]

This is for your understanding only. Every engine has its own valve lift and corresponding crank angles. If you have any question, feel free to ask.

PS: Rename lift.txt to lift.prof or anything_really.prof

[Lukman]

Thanks for your reply. I'm very grateful. I've tried the format you sent to me. Please will the profile contain both the graph and the text format. The error that always proped up was that "valve lift are at zero,check the valve lift profile format".
Thanks very much for your timely reply.
Is it possible for me to have your what's app contact. Thanks.

[adilsyyed]

Originally Posted by Lukman

Thanks for your reply. I'm very grateful. I've tried the format you sent to me. Please will the profile contain both the graph and the text format. The error that always proped up was that "valve lift are at zero,check the valve lift profile format".
Thanks very much for your timely reply.
Is it possible for me to have your what's app contact. Thanks.

No, you only need the text format file.The graph is the one you make in excel for yourself, or for understanding. you don't have to make it if you don't want.

Have you given valve lift values in your prof file?

As I said in earlier post, rename the text file to .prof

The format for valve lift profile is .prof
You can make your file as text file in notepad and then rename it as .prof file.
But remember that the .prof must be the format or extension of the file, not the name. Sometimes the extension .txt is hidden and we endup renaming the file instead of the extension; in which case it would become lift.prof.txt which is still a text file.
If you are facing difficulty renaming the file, just follow step by step instructions at http://www.mediacollege.com/microsof...on-change.html

[Lukman]

I'm very sorry for the late ackwnoledgement of your previous conbtribution.
Thanks very much for your contribution all this while. Really appreciated.
Please I have a very tough challenge with my geometry, I have model my geometry more than 10 times but all could not give the desired result.so many amendments has been made all to no avail.
Please I won't mind if you can assist in this regard by sending the geometry that was used in the ansys tutorial if you have.Thanks for your usual cooperation.

[adilsyyed]

Originally Posted by Lukman

I'm very sorry for the late ackwnoledgement of your previous conbtribution.
Thanks very much for your contribution all this while. Really appreciated.
Please I have a very tough challenge with my geometry, I have model my geometry more than 10 times but all could not give the desired result.so many amendments has been made all to no avail.
Please I won't mind if you can assist in this regard by sending the geometry that was used in the ansys tutorial if you have.Thanks for your usual cooperation.

Since I don't own the rights to the geometry of my project, I may not be able to share it with you. But I will help you with yours if I can.
What problem do you face?
Specifically,
1. The FLUID PART of the intake/exhaust ports need to be modeled.
2. The SOLID PART of the intake/exhaust valve need to be modeled.
3. The FLUID PART of the of the cylinder needs to be modeled.
4. The piston is not modeled.

The whole geometry is then decomposed at a certain crank angle (say intake valve opening crank angle), which then helps in dynamic meshing of the geometry.

[Lukman]

Good morning thanks for your contributions all this while.
Please I'm encountered some challenges of recent.
I have started the simulation, I'm at the calculation stage at about 360 crank angle starting from 323.25 the simulation stops.it brought an error saying no current activation, it complain about the journal and specifically it complaints about the temperature. I'm using 4gb,64-bit,core-i3 for the simulation. Please could this be as a result of hardware problem. And what is the minimum hardware requirement for cold flow simulation.
Thanks in anticipation of your reply.

[Phantomz]

Originally Posted by adilsyyed

This is for your understanding only. Every engine has its own valve lift and corresponding crank angles. If you have any question, feel free to ask.

PS: Rename lift.txt to lift.prof or anything_really.prof

is it contain piston profile also or do we need to create separately and merge with the valve profile

[sanusi]

hi guys, i'm current working on diesel engine and i need guide on generating my profile files myself. the geometry, valve and injection profile and others for a full engine simulation.

[kuenday]

Originally Posted by adilsyyed

This is for your understanding only. Every engine has its own valve lift and corresponding crank angles. If you have any question, feel free to ask.

PS: Rename lift.txt to lift.prof or anything_really.prof

how do I get this information? the valve lift and crank angles for the engine?