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

Fluent transient ICE simulation - exhaust cyclic "function"

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 4, 2021, 16:51
Default Fluent transient ICE simulation - exhaust cyclic "function"
  #1
New Member
 
Hubert
Join Date: Dec 2019
Posts: 4
Rep Power: 6
Karpatek is on a distinguished road
Hello!

For a university project I am doing a simulation of scavenging of a two stroke diesel engine concept in ANSYS Fluent. I've been doing something similar for my Bachelors Thesis so the subject is not new for me. I would like to ask a simple question about modelling exhaust manifold. So far I've been simulating just one cylinder (the engine has 6 of them) and I have been giving a pressure outlet boundary condition at the end of this cylinder exhaust port (manifold was very simplified). I think that at the moment where my computations are I should do it more precisely and add an impact of another 5 cylinders on flow in exhaust manifold.

What I thought about was to write an UDF, which will "take" the computed mass flow/pressure/temperature from near of exhaust port outlet, delay it by 60 degrees, and put those "boundary conditions" on geometrical end of another cylinder (which will not be fully simulated, because then the simulation will be very big and expensive), which should in my mind provide "simulated" impact on physics of exhaust manifold and better show reality.

I dont know if it is a good idea, I have never done a UDF in Ansys Fluent, so I wanted to ask someone familiar with this programme if I have a good idea or maybe there is another, simple way to achieve the same what I would like?

I will be very grateful for any help!!

Best regards,
Hubert
Karpatek is offline   Reply With Quote

Reply

Tags
exhaust, ice, scavenging, transient

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
Transient Simulation in CFX ashtonJ CFX 1 September 28, 2018 02:18
Exhaust Manifold Transient Heat Transfer Simulation Jonny6001 STAR-CCM+ 9 February 22, 2017 14:24
No heat transfer in transient simulation (Fluent) Leo5217 FLUENT 0 July 30, 2016 10:46
Problem in initializing transient simulation with a finer mesh sidd CFX 8 April 29, 2016 03:25
How to plot any parameter against time for Transient simulation in Fluent? chauhan FLUENT 3 April 27, 2016 17:22


All times are GMT -4. The time now is 04:07.