[Nek5000-users] Pipe with expansion
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Fri Jan 24 04:34:12 CST 2014
Hello Paul,
Thanks for your reply. I am looking into the .usr file for defining the
set_obj ().
1) Could you please tell me what is 'Enter the number of levels ?' in n2to3
is it the number of elements in Z direction ?
2) As you said about storing the computed vorticity in velocity field to
view in VisIT, I found the routine to compute the vorticity but I am
stuck about adding it to the velocity filed to VisIT ? could you please
tell me how it works or any example which stores vorticity to the .fld
file as a separate variable.
Thank you
Kamal
On 22/01/2014 16:53, nek5000-users at lists.mcs.anl.gov wrote:
> Axial viscous stress is given by torq_calc -- that's no problem whatsoever. You get a number as a
> function of time.
>
> You can even get stresses on multiple subsets of the geometry (e.g., if you had multiple branches
> in the domain or multiple cylinders. The drag, which is a byproduct of the torque computation (which
> you can ignore), is given in terms of the viscous and pressure components separately and as the
> sum of the two.
>
> You can identify domain boundaries by checking the boundary conditions. Here, I recommend
> looking at the set_obj routines in several of the /example cases.
>
>
> ________________________________________
> From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
> Sent: Wednesday, January 22, 2014 9:37 AM
> To: nek5000-users at lists.mcs.anl.gov
> Subject: Re: [Nek5000-users] Pipe with expansion
>
> Hello Paul
>
> I was thinking about taking the tangential velocity near to the wall so that I can figure out my length of the recirculation region.
>
> Is it possible for me to access the boundary elements of the mesh ??? so that I can take the boundary element and then obtain the velocity at that point so that I can figure out the length of my recirculation region.
>
> or take the *.fld file and read it to plot the datas I need.
>
>
> I also want to calculate the axial viscous force acting on the entire pipe.
>
> which is given by
>
> C_v = F^v / ( d^2 * rho * U^2 ) = double integral ( 1/Re * (du / dr) ) dtheta dz
>
>
> On Jan 22, 2014, at 4:07 PM, nek5000-users at lists.mcs.anl.gov wrote:
>
>> Hi Kamal,
>>
>> As I thought about it some more, if you're interested in the local wall shear stress
>> magnitude I'm quite certain you can get this by plotting the magnitude of vorticity
>> on the surface in question. (Note that the sign of the WSS, which in fact is a tensor
>> or a vector when restricted to a given surface, is lost in this process, but that might
>> not be relevant for your needs.) If that works, then you can readily compute the
>> vorticity using one of the routines in nek and store the result in a velocity field, then
>> view that field with VisIt. Of course WSS will require multiplication by viscosity.
>>
>> hth,
>>
>> Paul
>>
>> ________________________________________
>> From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
>> Sent: Tuesday, January 21, 2014 10:33 AM
>> To: nek5000-users at lists.mcs.anl.gov
>> Subject: Re: [Nek5000-users] Pipe with expansion
>>
>> Hi paul,
>>
>> can I make this to be drag or shear quantities to be return to the a
>> separate file so that it will easy for me to plot.
>>
>> By the way it gives the integral quantity. Think for example I need to
>> find the shear stress on the wall from the inlet to outlet at a
>> particular time = 2 . How can I do that ?
>>
>> Is there way to find the number of elements in x,y and z direction ?
>>
>> On 21/01/2014 17:32, nek5000-users at lists.mcs.anl.gov wrote:
>>> Hi Kamal,
>>>
>>> Your integrated drag quantities should be written to the logfile
>>> (stdout),
>>> assuming you've set the arguments in the call to be .true.
>>>
>>> Paul
>>>
>>> On Tue, 21 Jan 2014, nek5000-users at lists.mcs.anl.gov wrote:
>>>
>>>> Hi Paul,
>>>>
>>>> I checked the set_obj subroutine and implemented one in my .USR file.
>>>> The code seem to run without any errors but I don't find where these
>>>> variables are getting stored.
>>>>
>>>> I use VisIT to visualize my output, even there was no change in it.
>>>>
>>>> do I have to define my own output file and write the variables out ?
>>>>
>>>> Thanks,
>>>>
>>>> Kamal.
>>>>
>>>>
>>>> On 20/01/2014 21:52, nek5000-users at lists.mcs.anl.gov wrote:
>>>>> Hi Kamal,
>>>>>
>>>>> You'll need to compute your own tke by manipulating the
>>>>> velocity fields.
>>>>>
>>>>> You can get running averages of the requisite quantities
>>>>> via calls to "avg_all" which is found in navier5.f
>>>>>
>>>>> You can compute shear stress on the wall simply by computing
>>>>> the drag on the wall, which can be done via a call to torque_calc(),
>>>>> also found in navier5.f
>>>>>
>>>>> If you cd to /examples and type:
>>>>>
>>>>> grep torq */*.usr
>>>>>
>>>>> you'll find many examples of calls to torque_calc. You simply
>>>>> need to prescribe the surfaces on which shear is to be integrated.
>>>>>
>>>>> I typically write a routine "set_obj" to identify such surfaces
>>>>> on the first call to usrchk.
>>>>>
>>>>> grep set_obj */*.usr
>>>>>
>>>>> will show similar examples.
>>>>>
>>>>> I would recommend trying this for laminar Poiseiulle flow in
>>>>> a very simple channel just to check that your calls are properly
>>>>> set.
>>>>>
>>>>> Best,
>>>>>
>>>>> Paul
>>>>>
>>>>>
>>>>> On Mon, 20 Jan 2014, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>
>>>>>> Hi Paul,
>>>>>>
>>>>>> Thanks and that helped.
>>>>>>
>>>>>> Where can I find the variables like Turbulent KE , shear stress on
>>>>>> the wall. ?
>>>>>>
>>>>>> Do i have to activate some parameters for calculating them ?
>>>>>>
>>>>>> If I had to plot them.
>>>>>>
>>>>>> Thanks,
>>>>>> Kamal
>>>>>>
>>>>>>
>>>>>> On Jan 20, 2014, at 5:41 AM, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>
>>>>>>> Kamal,
>>>>>>>
>>>>>>> Looks good.
>>>>>>>
>>>>>>> I'm guessing that one further refinement would be:
>>>>>>>
>>>>>>> if (z.gt.z0) scale = 1 + (smax-1)*(z-z0)/(z1-z0)
>>>>>>> if (z.gt.z1) scale = smax
>>>>>>>
>>>>>>> which would yield
>>>>>>>
>>>>>>> scale = 1 when z=z0
>>>>>>> scale = smax when z >= z1
>>>>>>>
>>>>>>> Paul
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Sun, 19 Jan 2014, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>
>>>>>>>> Hi paul,
>>>>>>>>
>>>>>>>> The code works fine, but there should be a small change thats has
>>>>>>>> to be done
>>>>>>>>
>>>>>>>>
>>>>>>>> if (z.gt.z0) scale = 1 + (z /(z1-z0 )))
>>>>>>>> if (z.gt.z1) scale = smax
>>>>>>>>
>>>>>>>> This creates a perfect diverging pipe.
>>>>>>>>
>>>>>>>> Thanks for the help paul.
>>>>>>>>
>>>>>>>> Kamal
>>>>>>>>
>>>>>>>> On Jan 20, 2014, at 12:09 AM, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>
>>>>>>>>> Hi paul,
>>>>>>>>>
>>>>>>>>> If I am not wrong,
>>>>>>>>> I make a mesh with three straight pipes( inlet, divergent,
>>>>>>>>> outlet ) connected together via n2to3 so that I know the element
>>>>>>>>> connectivity places of the divergent section (z0,z1) and use the
>>>>>>>>> section what you gave
>>>>>>>>>
>>>>>>>>> Thank you for the code
>>>>>>>>>
>>>>>>>>> Kamal
>>>>>>>>>
>>>>>>>>> On Jan 19, 2014, at 8:45 PM, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>
>>>>>>>>>> Kamal,
>>>>>>>>>>
>>>>>>>>>> I would do the following in usrdat2():
>>>>>>>>>>
>>>>>>>>>> n=nx1*ny1*nz1*nelt
>>>>>>>>>>
>>>>>>>>>> do i=1,n
>>>>>>>>>> x=xm1(i,1,1,1)
>>>>>>>>>> y=ym1(i,1,1,1)
>>>>>>>>>> z=ym1(i,1,1,1)
>>>>>>>>>> scale = 1.
>>>>>>>>>> if (z.gt.z0) scale = smax*(z-z0/(z1-z0)
>>>>>>>>>> if (z.gt.z1) scale = smax
>>>>>>>>>> xm1(i,1,1,1) = scale*x
>>>>>>>>>> ym1(i,1,1,1) = scale*y
>>>>>>>>>> enddo
>>>>>>>>>>
>>>>>>>>>> Paul
>>>>>>>>>>
>>>>>>>>>> Make certain that z1 and z0 correspond to z values
>>>>>>>>>> that precisely coincide with element interfaces.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Sun, 19 Jan 2014, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>
>>>>>>>>>>> I looked into the Peris example but It is so what same like
>>>>>>>>>>> the stenosis example with a Cosine deformation.
>>>>>>>>>>>
>>>>>>>>>>> In my case it is a pipe with conical divergent. I tried to
>>>>>>>>>>> play around the variables Xm1, Ym1 and Zm1 but the mapping
>>>>>>>>>>> doesn't go well.
>>>>>>>>>>>
>>>>>>>>>>> Could you please help me with this.
>>>>>>>>>>>
>>>>>>>>>>> Thank you,
>>>>>>>>>>>
>>>>>>>>>>> Kamal
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Jan 18, 2014, at 7:26 PM, nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>>
>>>>>>>>>>>> I looked at the Helix and stenosis example but they are using
>>>>>>>>>>>> cosine functions to deform
>>>>>>>>>>>>
>>>>>>>>>>>> I tried to use a tangent function but it bends the whole pipe.
>>>>>>>>>>>>
>>>>>>>>>>>> I dint look at peris example .
>>>>>>>>>>>>
>>>>>>>>>>>> I will take a look at it and let you know.
>>>>>>>>>>>>
>>>>>>>>>>>> Thank you
>>>>>>>>>>>>
>>>>>>>>>>>> Kamal
>>>>>>>>>>>>
>>>>>>>>>>>> On Jan 18, 2014, at 7:22 PM, nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Kamal,
>>>>>>>>>>>>>
>>>>>>>>>>>>> Have you looked at the peris example? The usr file there
>>>>>>>>>>>>> shows how to deform
>>>>>>>>>>>>> a pipe geometry.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Paul
>>>>>>>>>>>>>
>>>>>>>>>>>>> From: nek5000-users-bounces at lists.mcs.anl.gov
>>>>>>>>>>>>> [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of
>>>>>>>>>>>>> nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>> [nek5000-users at lists.mcs.anl.gov]
>>>>>>>>>>>>> Sent: Saturday, January 18, 2014 12:17 PM
>>>>>>>>>>>>> To: nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>> Subject: Re: [Nek5000-users] Pipe with expansion
>>>>>>>>>>>>>
>>>>>>>>>>>>> Dear Paul,
>>>>>>>>>>>>>
>>>>>>>>>>>>> I tried many ways to map my straight pipe geometry but it
>>>>>>>>>>>>> does not seem to work properly
>>>>>>>>>>>>>
>>>>>>>>>>>>> I used something like
>>>>>>>>>>>>>
>>>>>>>>>>>>> X = X + Z * tan ( alpha )
>>>>>>>>>>>>> Y = Y + Z* tan (alpha )
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> even that dint work. could please help me with this
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thank you
>>>>>>>>>>>>>
>>>>>>>>>>>>> Kamal.
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Jan 17, 2014, at 2:24 PM, nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks paul. I tried working with the diverging mesh
>>>>>>>>>>>>>> modification.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I tried to use this form of equation to modify the mesh
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> z = mx + b
>>>>>>>>>>>>>> z = ny + c
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> x = ( z - b ) / m
>>>>>>>>>>>>>> y = (z - c) / n
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Do you think would work ? or is there any other way to
>>>>>>>>>>>>>> input that ?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Kamal
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On 17/01/2014 14:14, nek5000-users at lists.mcs.anl.govwrote:
>>>>>>>>>>>>>>> Kamal,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 1) To check for convergence, run your simulation for
>>>>>>>>>>>>>>> increasing polynomial orders ( lx1 in the SIZE file) and
>>>>>>>>>>>>>>> measure some consistent quantity (drag, TKE, etc). You
>>>>>>>>>>>>>>> can plot this quantity against lx1 and this should give
>>>>>>>>>>>>>>> you a good picture of how you are converging (without
>>>>>>>>>>>>>>> needing to change the physical mesh).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 2) If you weren't using temperature in your simulation,
>>>>>>>>>>>>>>> you could do put the following code snippet in your userchk
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> c-------------------------------------------
>>>>>>>>>>>>>>> integer i, ntot
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ntot = nx1*ny1*nz1*nelv ! total number of points in
>>>>>>>>>>>>>>> simulation (on THIS processor)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> do i = 1,ntot
>>>>>>>>>>>>>>> t(i,1,1,1,1) = 0.5*(vx(i,1,1,1)**2 + vy(i,1,1,1)**2 +
>>>>>>>>>>>>>>> vz(i,1,1,1)**2)
>>>>>>>>>>>>>>> enddo
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ifto = .true.
>>>>>>>>>>>>>>> c-------------------------------------------
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I've assumed here that your density is unity. This
>>>>>>>>>>>>>>> computed kinetic energy point-wise and stores it in the
>>>>>>>>>>>>>>> temperature field. The part "ifto = .true." tells Nek to
>>>>>>>>>>>>>>> output the temperature field whenever it outputs a field
>>>>>>>>>>>>>>> file. You could then view this in visit just like you
>>>>>>>>>>>>>>> would the velocity field.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hope this helps!
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Josh
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Wed, Jan 15, 2014 at 9:52 AM,
>>>>>>>>>>>>>>> <nek5000-users at lists.mcs.anl.gov> wrote:
>>>>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I will try that mapping, I created a straight pipe to do
>>>>>>>>>>>>>>> some simulations.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 1) Is there a way to check my spectral convergence, so
>>>>>>>>>>>>>>> that I can do some mesh convergence study?
>>>>>>>>>>>>>>> 2) Is there a way to plot the kinetic energy in the flow ?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thank you,
>>>>>>>>>>>>>>> Kamal
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On 15/01/2014 12:14, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi Kamal,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> For the geometry you describe, I would apply mesh morphing
>>>>>>>>>>>>>>> to a standard straight pipe. You can create such a pipe
>>>>>>>>>>>>>>> using a subset of the mkmesh script provided in the expansion
>>>>>>>>>>>>>>> example.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> If your transition region is conical, then I woud make
>>>>>>>>>>>>>>> certain that the change in slope occurs at element
>>>>>>>>>>>>>>> boundaries,
>>>>>>>>>>>>>>> i.e., as in the half cross-section depicted below:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _______________
>>>>>>>>>>>>>>> /| | |
>>>>>>>>>>>>>>> / | | |
>>>>>>>>>>>>>>> /| | | |
>>>>>>>>>>>>>>> ________________/ | | | |
>>>>>>>>>>>>>>> | | | | | | | |
>>>>>>>>>>>>>>> | | | | | | | |
>>>>>>>>>>>>>>> +-----+-----+---+--+---+------+------+----> z
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Paul
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Wed, 15 Jan 2014, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I looked at the example and it looks very helpful, but for
>>>>>>>>>>>>>>> a sudden expansion we have only two parts (i.e) the inlet
>>>>>>>>>>>>>>> pipe and the outlet pipe. Whereas in a diverging pipe we
>>>>>>>>>>>>>>> have three section (i.e,) The inlet pipe, Diverging
>>>>>>>>>>>>>>> section and the outlet pipe.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Is it possible for me to create a 2D diverging section
>>>>>>>>>>>>>>> using mesh modification and revolve it around the centre
>>>>>>>>>>>>>>> axis to get a 3d diverging pipe ?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> or should I apply the mesh modification directly to the 3d
>>>>>>>>>>>>>>> sudden expansion pipe using usrdat2() ?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>> Kamal
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On 14/01/2014 21:09, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>>>>>>> Hi Paul,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the update. I will take a look at as soon
>>>>>>>>>>>>>>> as possible and keep you updated with it.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thank you,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Kamal
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Jan 14, 2014, at 9:04 PM,
>>>>>>>>>>>>>>> nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Kamal,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I've added an example for a step-type expansion in a pipe.
>>>>>>>>>>>>>>> New example directory
>>>>>>>>>>>>>>> is nek5_svn/examples/expansion, with a README.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> If you want a standard diffuser, I would use
>>>>>>>>>>>>>>> mesh-morphing, as outlined in the
>>>>>>>>>>>>>>> nek primer, which can be found on this page:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> http://nek5000.mcs.anl.gov/index.php/UG#Documentation
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I've also automated our turbulent outflow bc treatment --
>>>>>>>>>>>>>>> one simply provides an
>>>>>>>>>>>>>>> expansion factor (typically ~ 1.5) and two persistent
>>>>>>>>>>>>>>> arrays to turb_outflow(), which
>>>>>>>>>>>>>>> is now in navier5.f. This can be useful when very
>>>>>>>>>>>>>>> strong vortices are leaving the
>>>>>>>>>>>>>>> domain, which is possible for certain diffuser flow
>>>>>>>>>>>>>>> conditions (and others).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Paul
>>>>>>>>>>>>>>> ________________________________________
>>>>>>>>>>>>>>> From: nek5000-users-bounces at lists.mcs.anl.gov
>>>>>>>>>>>>>>> [nek5000-users-bounces at lists.mcs.anl.gov] on behalf
>>>>>>>>>>>>>>> ofnek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>>>> [nek5000-users at lists.mcs.anl.gov]
>>>>>>>>>>>>>>> Sent: Monday, January 13, 2014 3:35 AM
>>>>>>>>>>>>>>> To: nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>>>> Subject: [Nek5000-users] Creating a Mesh
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Can some one please help me in this because I am new to nek
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 1) How can I create a .rea for a specific geometry say ' A
>>>>>>>>>>>>>>> sudden
>>>>>>>>>>>>>>> expansion pipe ' or a ' Diverging pipe '
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 2) What tool I should use to create that mesh.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thank you
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> kamal
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
>>>>>>>>>>>>>>> Nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
>>>>>>>>>>>>>>> Nek5000-users at lists.mcs.anl.gov
>>>>>>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
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>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
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>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
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>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
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>>>>>>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>> Josh Camp
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> "All that is necessary for the triumph of evil is that
>>>>>>>>>>>>>>> good men do nothing" -- Edmund Burke
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>> Nek5000-users mailing list
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