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Search took 0.00 seconds. Search: Posts Made By: Doug68
Forum: OpenFOAM January 2, 2013, 03:11
Replies: 24
Views: 11,302
Posted By Doug68
So now I believe that finding the CoP using the...

So now I believe that finding the CoP using the data on forces.dat on its own is not possible.
Regardless of the number of files produced for different CoR's.

I think the most that can be proven...
Forum: OpenFOAM December 26, 2012, 19:46
Replies: 24
Views: 11,302
Posted By Doug68
Yeah, you are right my last effort will give the...

Yeah, you are right my last effort will give the zero torque point at the elevation stated.

more thought required :(
Forum: OpenFOAM December 22, 2012, 08:45
Replies: 24
Views: 11,302
Posted By Doug68
Carrying on with the brute force and ignorance...

Carrying on with the brute force and ignorance approach...

Using the method shown further up the thread I set up to create results on 11 CoR's 100mm apart on a straight line on the XZ plane, this...
Forum: OpenFOAM December 21, 2012, 19:38
Replies: 24
Views: 11,302
Posted By Doug68
Hi GPan1, I think if you've got large...

Hi GPan1,

I think if you've got large moments about X or Z then the chances of the CoP being on the XZ plane are slim.
Assuming the car is symmetrical on the XZ plane then I'd set about getting...
Forum: OpenFOAM December 16, 2012, 03:15
Replies: 24
Views: 11,302
Posted By Doug68
Now after looking at the results from the 3 COR...

Now after looking at the results from the 3 COR controldict I'm not very happy with it.
If the math tied up then the 3 curves should cross at the same point, but they don't.
With two of the COR's...
Forum: OpenFOAM December 12, 2012, 17:28
Replies: 24
Views: 11,302
Posted By Doug68
Get my spreadsheet from: ...

Get my spreadsheet from:

http://guerillamotive.com/OpenFOAM/CoP.xlsx

The bit for the curves starts at row 1014 it repeats for the 2 curves.
The raw data used for the first curve are the rows...
Forum: OpenFOAM December 12, 2012, 07:33
Replies: 24
Views: 11,302
Posted By Doug68
GPan, that methods great! I've tweaked it a bit...

GPan, that methods great! I've tweaked it a bit to stick it all in controlDict (see attached). I'm doing a run like this right now and it seems to work just fine.

For my problems, with the model...
Forum: OpenFOAM December 11, 2012, 21:38
Replies: 24
Views: 11,302
Posted By Doug68
Sorry I have no experience with swak4foam, I've...

Sorry I have no experience with swak4foam, I've had no reason to go look at it before now.
Forum: OpenFOAM December 10, 2012, 00:45
Replies: 24
Views: 11,302
Posted By Doug68
I've not got around to chasing through Julien's...

I've not got around to chasing through Julien's information yet.
I think the method I have gets quite close, but I am not sure it is 100% accurate.

Its kind of interesting to me that this subject...
Forum: OpenFOAM November 13, 2012, 02:14
Replies: 24
Views: 11,302
Posted By Doug68
Hi Julien, Can I ask you to explain: "I...

Hi Julien,

Can I ask you to explain:

"I noticed that the forces and moment output in the forces.dat file were not orthogonal"

A bit further, that's a bit of a worry.
Did you mean that say...
Forum: OpenFOAM November 10, 2012, 08:38
Replies: 24
Views: 11,302
Posted By Doug68
Find Center of Pressure?

Hi All,

I'm running automotive type aero simulations and I wish to work out the center of pressure for the vehicle.
I've spent a lot of time search on how this might be done but have had no luck...
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