CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS

(Failed) Use of optimisation with FLUENT study

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

LinkBack Thread Tools Search this Thread Display Modes
Old   December 12, 2017, 04:39
Default (Failed) Use of optimisation with FLUENT study
New Member
Join Date: Nov 2017
Posts: 1
Rep Power: 0
mrb93 is on a distinguished road
I am trying to design a the underfloor of a car, and have set up a 2D study to find the best inlet and outlet angles of the floor, so essentially a diffuser. I am only looking at the outlet at the moment. Due to constraints, the outlet can only be a certain length. As such I am modelling the length as a function of the angle.

My model is imported from SolidWorks, I have the both the angle of the diffuser and length of the diffuser as parameters.
I can then mesh and run a simulation. I then use the Lift force or force in the Y direction to calculate the downforce the floor is producing. I set the Y force as my output parameter.

In an optimisation study, I then set my diffuser length as a function of my angle so it changes with the angle automatically. Finally for my objectives, I select maximise downforce and put no constraints on the angle - my hope being ANSYS will find the angle that returns most downforce.
The optimisation then forms a study with multiple angles and calculates their respective lengths. It then fails when trying to calculate the Y force and returns this error:
Update failed for the Optimization component in Direct Optimization. The Optimization component in Direct Optimization does not contain all entity types advertised in its component template, even after update
I cannot understand why it isn't working, and I can't find much information on the subject either. I can run individual studies using geometry I change in Design Modeler. I wouldn't even mind selecting the best points myself, If I could just get it to work so I can have a table showing diffuser angles vs downforce, that would be good.

I have got optimisation to work when doing Static Structural analysis on ANSYS, so I wonder if it is something to do with FLUENT? Or maybe because I create a boolean of my floor, so the actual model with all dimensions isn't really in the simulation?

I'm at a loss, and would appreciate any help. I am certain there are several problems throughout my study - I am mostly self taught.

Many thanks.
mrb93 is offline   Reply With Quote


failed, fluent, optimization, parameter, solidworks

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
Foam::error::printStack(Foam::Ostream&) with simpleFoam -parallel U.Golling OpenFOAM Running, Solving & CFD 52 September 23, 2023 03:35
"The FLUENT application failed to validate the connection." problem rkadlof FLUENT 4 April 20, 2017 00:54
(New to CFD) How to do a mesh refinement study w/ Fluent? JAviles FLUENT 3 June 27, 2014 13:55
Problems installing OpenFOAM 2.3.0, 1.6-ext and foam-extend 3.0 sam.ho OpenFOAM Installation 35 April 5, 2014 15:31
Optimisation tools on Fluent? steve Main CFD Forum 2 July 4, 2004 17:22

All times are GMT -4. The time now is 14:59.