CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Problem with UDS in two stroke combustion engine with valve motion

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 10, 2020, 05:18
Question Problem with UDS in two stroke combustion engine with valve motion
  #1
New Member
 
Hubert
Join Date: Dec 2019
Posts: 4
Rep Power: 6
Karpatek is on a distinguished road
Dear friends,

I am trying to simulate work cycle of a two stroke piston engine, with unusual for them valve placing. I was doing something similar to this for my bachelors engineering thesis, so the basics in Fluent are clear for me, but I have some weird problem.

I have to analyse the charge exchange, so the UDS is very important for me, but unfotunately it's not working how it is "supposed" to. What I mean by this, is the fact that after start of valve motion it is still in "0 to 1" borders, but after some more time steps it starts to rise to enormous values, and Fluent cannot work with that, and gives me back error: "Floating point exception". You can see how it looks like on simulation by clicking the links below (my Google drive):

1) Mesh: https://drive.google.com/file/d/1j2Y...ew?usp=sharing
2) UDS: https://drive.google.com/file/d/1Q9x...ew?usp=sharing

Could anyone help me with this error? Maybe someone had the same problem? I will be very grateful
Karpatek is offline   Reply With Quote

Reply

Tags
charge exchange, two-stroke engine, uds, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
IC engine valve dynamic mesh modelling soogeng FLUENT 0 April 14, 2018 11:27
Valve motion and dynamics martinav STAR-CCM+ 1 March 21, 2017 22:47
mesh quality problem for displacementSBRStress motion solver zhaozhenkai OpenFOAM 0 January 22, 2017 12:02
How to use "translation" in solidBodyMotionFunction in OpenFOAM rupesh_w OpenFOAM Running, Solving & CFD 5 August 16, 2016 05:27
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 07:20


All times are GMT -4. The time now is 23:38.