[overture] Re: Two pipes
- From: Shi Qiu <shiq@xxxxxxx>
- To: "overture@xxxxxxxxxxxxx" <overture@xxxxxxxxxxxxx>
- Date: Fri, 10 Oct 2014 12:58:05 -0700
Hi Bill,
Is there a way to make the disk surface touch the cylinder? Because I want
to simulate a switch (disk in the pipe). When it closes, there is no flow.
When it opens with an angle, I want to find out the pressure distribution
on it. In the latter situation, some parts of the disk will tough the
cylinder. Any suggestions?
Thanks a lot.
Best,
Stone
On Fri, Oct 10, 2014 at 6:47 AM, Bill Henshaw <wdhenshaw@xxxxxxxxx> wrote:
> Hi Stone
> It sounds like you have figured out how to build a disk -- see
> also pillInABoxGrid.cmd for a grid for a disk.
> You will need to decrease the diameter of the disk surface so
> that it does not touch the cylinder -- so there is a gap at of least 3-5
> grid lines and
> then you should be able to construct the grid. It doesn't
> matter if the disk volume grid goes outside the cylinder (only the
> disk surface needs to be inside) as ogen will cut away this part.
>
> Regards
> Bill
>
>
>
> On Fri, Oct 10, 2014 at 1:51 AM, Shi Qiu <shiq@xxxxxxx> wrote:
>
>> 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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