[overture] Re: Two pipes
- From: Shi Qiu <shiq@xxxxxxx>
- To: "overture@xxxxxxxxxxxxx" <overture@xxxxxxxxxxxxx>
- Date: Thu, 9 Oct 2014 22:51:33 -0700
Hi Bill and Mike,
I am sure that you are really busy and I appreciate you taking the time to
respond personally to me.
I have been studying these samples for a week. Now I have some ideas about
how to generate the grid I want. Originally the goal is to generate a pipe
and put a solid disk in the pipe with an angle, the diameter of the disk is
same with pipe (which means some parts of the disk are tangent with the
pipe). I want to use cgins to find out pressure distribution on the disk
when there are uniform flow in the pipe. The first approach I tried was to
use one thin pipe as disk and set its boundaries as physical boundary, then
I put it in another pipe. But this does not work. Then I found the body of
revolution function. Now I am trying to use this function to build a dick
(similar to revolve.cmd in sampleGrids folder). Then use rotate/scale/shift
function to rotate a pipe and put the disk in it. However, I have some
problems when I want to put the dick in the pipe with the boundaries
tangent to the pipe. This is because of there are body fitted grids around
the dick. When it is tangle to the pipe, these grids will be outside the
pipe. Could you give me some suggestions please? Is there a better approach
to generate these grids?
Thanks again,
Best,
Stone
On Wed, Oct 1, 2014 at 9:14 AM, Mike Singer <msinger2006@xxxxxxxxx> wrote:
> Hi Stone,
>
> I remember doing something similar a few years ago. I just put the pipes
> close to each other (and overlapping a bit), and ogen figured out the hole
> cutting and made a nice overlapping grid. You might want to give it a try
> since having ogen figure it out is probably the most straightforward
> approach. Btw, you'll likely have to play with the amount of overlap, grid
> resolution, etc. in order to make it work.
>
> Mike
>
>
>
> On Wed, Oct 1, 2014 at 7:39 AM, Bill Henshaw <wdhenshaw@xxxxxxxxx> wrote:
>
>> Hi Stone,
>>
>> twoPipes.cmd - uses a special analytically defined fillet grid, might
>> be possible to
>> work out the formula or pipes at an angle.
>>
>> filletTwoCyl.cmd - uses the more generic FilletMapping which may work
>> if the pipes are at an angle,
>> this example creates grids "outside" the pipes but this
>> can be changed to do inside.
>>
>> joinTwoCyl .cmd - another example with a sharp corner join,
>> if you want the region exterior to the two pipes.
>>
>>
>> If you can get a IGES (CAD) file of the geometry then you can create a
>> grid with the
>> hyperbolic grid generator.
>>
>> ...Bill
>>
>> On Tue, Sep 30, 2014 at 2:22 AM, Shi Qiu <shiq@xxxxxxx> wrote:
>>
>>> Hi Bill,
>>>
>>> In the Overture sample grids folder. I saw the sample of two pipes
>>> intersect with each other (3D). I wonder that if we can change the angle of
>>> two pipes, make them not perpendicular with each other. Could you give me
>>> some suggestions about this problem please?
>>>
>>> Best,
>>>
>>> Stone
>>>
>>>
>>>
>>>
>>
>
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