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Orb February 8, 2012 13:18
Error ?
 
What does this error mean:

ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| SYMASS_ZIFCS_EL : The solver ran out of temporary space while bui- |
| lding a linked list for a domain interface. Try setting the expe- |
| rt parameter "topology estimate factor zif" to a value greater th- |
| an 1.0. Values higher than 1.2 should not be necessary.

I tried values of 2.0+, but still the same error... Could anyone take a look at my model? Thanks!

ghorrocks February 8, 2012 16:42
The error is saying it is having a hard time assembling your interface. I would remesh and try to improve the mesh quality around the interface.

stumpy February 8, 2012 16:44
Make sure you really did set "topology estimate factor zif" and not a very similar parameter that is in the GUI. I think you have to set "topology estimate factor zif" via CCL.

Orb February 8, 2012 18:03
How do I get to CCL?

Orb February 8, 2012 18:06
Quote:
Originally Posted by Orb (Post 343473)
How do I get to CCL?
I went to "Expert Parameters" then "Convergence Control" Then checked "topology estimate factor" and set it to 2.0. Is that the right one?

Orb February 8, 2012 22:24
Ok, I got it to solve without errors. But now my results show no motion even though I have a rotational device inside of a fluid... but nothing moves..

ghorrocks February 8, 2012 22:31
Is it a steady state or transient run? Have you run it long enough to see motion? Is the rotating bit transient rotor-stator of some other form of motion?

Orb February 8, 2012 22:45
Quote:
Originally Posted by ghorrocks (Post 343497)
Is it a steady state or transient run? Have you run it long enough to see motion? Is the rotating bit transient rotor-stator of some other form of motion?
I would like it to be transient, although I'm not aware of how to enable that. It is basically a fan inside a tube with open ends and the whole thing is in a domain of fluid (air). I want the fan to distribute the air and test the performance.

ghorrocks February 9, 2012 06:22
Well of course if the simulation is steady state then nothing is going to move at all. Doesn't that explain the lack of motion?

Orb February 9, 2012 06:30
Quote:
Originally Posted by ghorrocks (Post 343536)
Well of course if the simulation is steady state then nothing is going to move at all. Doesn't that explain the lack of motion?
Yeah, but the results are all zero.

ghorrocks February 9, 2012 06:35
Can you post an image of the results and what you are trying to model?

Orb February 9, 2012 11:00
http://img252.imageshack.us/img252/62/setupforcfd.jpg

Uploaded with ImageShack.us

ghorrocks February 9, 2012 16:09
I assume the fan rotates and generates a flow. What is the interface which caused the initial problem? Can you post your CCL?

Orb February 9, 2012 18:28
Sorry, how do I get to the CCL?

Is this it?


+--------------------------------------------------------------------+
| Mesh Statistics |
+--------------------------------------------------------------------+
| Domain Name | Orthog. Angle | Exp. Factor | Aspect Ratio |
+----------------------+---------------+--------------+--------------+
| | Minimum [deg] | Maximum | Maximum |
+----------------------+---------------+--------------+--------------+
| Domain 1 | 90.0 OK | 1 OK | 1 OK |
| Domain 2 | 60.9 OK | 3 OK | 2 OK |
| Domain 3 | 38.4 ok | 10 ok | 7 OK |
| Global | 38.4 ok | 10 ok | 7 OK |
+----------------------+---------------+--------------+--------------+
| | %! %ok %OK | %! %ok %OK | %! %ok %OK |
+----------------------+---------------+--------------+--------------+
| Domain 1 | 0 0 100 | 0 0 100 | 0 0 100 |
| Domain 2 | 0 0 100 | 0 0 100 | 0 0 100 |
| Domain 3 | 0 1 99 | 0 2 98 | 0 0 100 |
| Global | 0 <1 100 | 0 <1 100 | 0 0 100 |
+----------------------+---------------+--------------+--------------+

Domain Name : Domain 1

Total Number of Nodes = 40560

Total Number of Elements = 36875
Total Number of Hexahedrons = 36875

Total Number of Faces = 7150

Domain Name : Domain 2

Total Number of Nodes = 24990

Total Number of Elements = 20160
Total Number of Prisms = 960
Total Number of Hexahedrons = 19200

Total Number of Faces = 10440

Domain Name : Domain 3

Total Number of Nodes = 6497

Total Number of Elements = 21045
Total Number of Tetrahedrons = 21045

Total Number of Faces = 10864

Global Statistics :

Global Number of Nodes = 72047

Global Number of Elements = 78080
Total Number of Tetrahedrons = 21045
Total Number of Prisms = 960
Total Number of Hexahedrons = 56075

Global Number of Faces = 28454

+--------------------------------------------------------------------+
| Reference Pressure Information |
+--------------------------------------------------------------------+

Domain Group: Domain 1

Pressure has not been set at any boundary conditions.
The pressure will be set to 0.00000E+00 at the following location:
Domain : Domain 1
Node : 1 (equation 1)
Coordinates : ( 1.16840E-01, 1.16840E-01, 2.83513E-01).

+--------------------------------------------------------------------+
| Average Scale Information |
+--------------------------------------------------------------------+

Domain Name : Domain 1
Global Length = 3.4007E-01
Minimum Extent = 2.5400E-01
Maximum Extent = 6.0960E-01
Density = 1.1850E+00
Dynamic Viscosity = 1.8310E-05
Velocity = 0.0000E+00

Domain Name : Domain 2
Global Length = 7.9063E-02
Minimum Extent = 1.1172E-01
Maximum Extent = 1.5240E-01
Density = 2.7020E+03
Thermal Conductivity = 2.3700E+02
Specific Heat Capacity at Constant Pressure = 9.0300E+02
Thermal Diffusivity = 9.7135E-05
Average Timescale = 6.4354E+01
Minimum Timescale = 1.2849E+02
Maximum Timescale = 2.3911E+02

Domain Name : Domain 3
Global Length = 2.4039E-02
Minimum Extent = 1.2700E-02
Maximum Extent = 8.9638E-02
Density = 2.7020E+03
Thermal Conductivity = 2.3700E+02
Specific Heat Capacity at Constant Pressure = 9.0300E+02
Thermal Diffusivity = 9.7135E-05
Average Timescale = 5.9494E+00
Minimum Timescale = 1.6605E+00
Maximum Timescale = 8.2720E+01



Subsystem : Momentum and Mass

U-Mom-Domain 1 --> U-Mom
V-Mom-Domain 1 --> V-Mom
W-Mom-Domain 1 --> W-Mom
P-Mass-Domain 1 --> P-Mass

Subsystem : Heat Transfer - 1

T-Energy-Domain 2 --> T-Energy-Domain 2

Subsystem : Heat Transfer - 2

T-Energy-Domain 3 --> T-Energy-Domain 3

Subsystem : TurbKE and Diss.K

K-TurbKE-Domain 1 --> K-TurbKE
E-Diss.K-Domain 1 --> E-Diss.K

CFD Solver started: Thu Feb 09 17:20:52 2012


| Timescale Information |
----------------------------------------------------------------------
| Equation | Type | Timescale |
+----------------------+------------------------+--------------------+
| U-Mom-Domain 1 | Auto Timescale | 2.24540E+03 |
| V-Mom-Domain 1 | Auto Timescale | 2.24540E+03 |
| W-Mom-Domain 1 | Auto Timescale | 2.24540E+03 |
+----------------------+------------------------+--------------------+
| T-Energy-Domain 2 | Auto Timescale | 6.43536E+01 |
+----------------------+------------------------+--------------------+
| T-Energy-Domain 3 | Auto Timescale | 5.94942E+00 |
+----------------------+------------------------+--------------------+
| K-TurbKE-Domain 1 | Auto Timescale | 2.24540E+03 |
| E-Diss.K-Domain 1 | Auto Timescale | 2.24540E+03 |
+----------------------+------------------------+--------------------+

================================================== ====================
OUTER LOOP ITERATION = 1 CPU SECONDS = 1.326E+00
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| U-Mom | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| V-Mom | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| W-Mom | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| P-Mass | 0.00 | 0.0E+00 | 0.0E+00 | 8.4 0.0E+00 OK|
+----------------------+------+---------+---------+------------------+
| T-Energy-Domain 2 | 0.00 | 1.9E-06 | 9.7E-06 | 5.3 4.9E-03 OK|
+----------------------+------+---------+---------+------------------+
| T-Energy-Domain 3 | 0.00 | 1.4E-06 | 6.8E-06 | 6.6 9.7E-03 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.00 | 1.8E+00 | 1.9E+00 | 5.1 2.2E-08 OK|
| E-Diss.K | 0.00 | 6.3E+00 | 6.5E+00 | 7.5 2.5E-08 OK|
+----------------------+------+---------+---------+------------------+

CFD Solver finished: Thu Feb 09 17:20:54 2012
CFD Solver wall clock seconds: 2.0000E+00


+--------------------------------------------------------------------+
| U-Mom-Domain 1 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| V-Mom-Domain 1 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| W-Mom-Domain 1 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| P-Mass-Domain 1 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| T-Energy-Domain 2 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| T-Energy-Domain 3 |
+--------------------------------------------------------------------+




+--------------------------------------------------------------------+
| Locations of Maximum Residuals |
+--------------------------------------------------------------------+
| Equation | Node # | X | Y | Z |
+--------------------------------------------------------------------+
| U-Mom-Domain 1 | 0 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| V-Mom-Domain 1 | 0 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| W-Mom-Domain 1 | 0 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| P-Mass-Domain 1 | 0 | 0.000E+00 | 0.000E+00 | 0.000E+00 |
| T-Energy-Domain 2 | 15473 |-3.063E-02 | 3.395E-02 |-2.540E-02 |
| T-Energy-Domain 3 | 1505 | 6.033E-03 | 2.596E-02 | 8.733E-04 |
| K-TurbKE-Domain 1 | 29304 |-9.652E-02 |-1.168E-01 | 2.628E-01 |
| E-Diss.K-Domain 1 | 17096 |-5.080E-03 | 4.572E-02 | 1.182E-01 |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| Peak Values of Residuals |
+--------------------------------------------------------------------+
| Equation | Loop # | Peak Residual | Final Residual |
+--------------------------------------------------------------------+
| U-Mom-Domain 1 | 0 | 0.00000E+00 | 0.00000E+00 |
| V-Mom-Domain 1 | 0 | 0.00000E+00 | 0.00000E+00 |
| W-Mom-Domain 1 | 0 | 0.00000E+00 | 0.00000E+00 |
| P-Mass-Domain 1 | 0 | 0.00000E+00 | 0.00000E+00 |
| T-Energy-Domain 2 | 1 | 1.91960E-06 | 1.91960E-06 |
| T-Energy-Domain 3 | 1 | 1.35297E-06 | 1.35297E-06 |
| K-TurbKE-Domain 1 | 1 | 1.78790E+00 | 1.78790E+00 |
| E-Diss.K-Domain 1 | 1 | 6.34034E+00 | 6.34034E+00 |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| False Transient Information |
+--------------------------------------------------------------------+
| Equation | Type | Elapsed Pseudo-Time |
+--------------------------------------------------------------------+
| U-Mom-Domain 1 | Auto | 2.24540E+03 |
| V-Mom-Domain 1 | Auto | 2.24540E+03 |
| W-Mom-Domain 1 | Auto | 2.24540E+03 |
| T-Energy-Domain 2 | Auto | 6.43536E+01 |
| T-Energy-Domain 3 | Auto | 5.94942E+00 |
| K-TurbKE-Domain 1 | Auto | 2.24540E+03 |
| E-Diss.K-Domain 1 | Auto | 2.24540E+03 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Average Scale Information |
+--------------------------------------------------------------------+

Domain Name : Domain 1
Global Length = 3.4007E-01
Minimum Extent = 2.5400E-01
Maximum Extent = 6.0960E-01
Density = 1.1850E+00
Dynamic Viscosity = 1.8310E-05
Velocity = 0.0000E+00

Domain Name : Domain 2
Global Length = 7.9063E-02
Minimum Extent = 1.1172E-01
Maximum Extent = 1.5240E-01
Density = 2.7020E+03
Thermal Conductivity = 2.3700E+02
Specific Heat Capacity at Constant Pressure = 9.0300E+02
Thermal Diffusivity = 9.7135E-05
Average Timescale = 6.4354E+01
Minimum Timescale = 1.2849E+02
Maximum Timescale = 2.3911E+02
Temperature Range = 6.1035E-05

Domain Name : Domain 3
Global Length = 2.4039E-02
Minimum Extent = 1.2700E-02
Maximum Extent = 8.9638E-02
Density = 2.7020E+03
Thermal Conductivity = 2.3700E+02
Specific Heat Capacity at Constant Pressure = 9.0300E+02
Thermal Diffusivity = 9.7135E-05
Average Timescale = 5.9494E+00
Minimum Timescale = 1.6605E+00
Maximum Timescale = 8.2720E+01
Temperature Range = 6.1035E-05

+--------------------------------------------------------------------+
| Variable Range Information |
+--------------------------------------------------------------------+

Domain Name : Domain 1
+--------------------------------------------------------------------+
| Variable Name | min | max |
+--------------------------------------------------------------------+
| Density | 1.18E+00 | 1.18E+00 |
| Specific Heat Capacity at Constant Pressure| 1.00E+03 | 1.00E+03 |
| Dynamic Viscosity | 1.83E-05 | 1.83E-05 |
| Thermal Conductivity | 2.61E-02 | 2.61E-02 |
| Static Entropy | 0.00E+00 | 0.00E+00 |
| Velocity u | 0.00E+00 | 0.00E+00 |
| Velocity v | 0.00E+00 | 0.00E+00 |
| Velocity w | 0.00E+00 | 0.00E+00 |
| Pressure | 0.00E+00 | 0.00E+00 |
| Turbulence Kinetic Energy | 4.77E-07 | 1.99E-01 |
| Turbulence Eddy Dissipation | 6.10E-05 | 1.40E+01 |
| Eddy Viscosity | 2.65E-10 | 3.05E-04 |
| Temperature | 2.98E+02 | 2.98E+02 |
+--------------------------------------------------------------------+

Domain Name : Domain 2
+--------------------------------------------------------------------+
| Variable Name | min | max |
+--------------------------------------------------------------------+
| Density | 2.70E+03 | 2.70E+03 |
| Specific Heat Capacity at Constant Pressure| 9.03E+02 | 9.03E+02 |
| Thermal Conductivity | 2.37E+02 | 2.37E+02 |
| Static Entropy | 0.00E+00 | 0.00E+00 |
| Temperature | 2.98E+02 | 2.98E+02 |
| Static Enthalpy | -3.12E-02 | 3.12E-02 |
+--------------------------------------------------------------------+

Domain Name : Domain 3
+--------------------------------------------------------------------+
| Variable Name | min | max |
+--------------------------------------------------------------------+
| Density | 2.70E+03 | 2.70E+03 |
| Specific Heat Capacity at Constant Pressure| 9.03E+02 | 9.03E+02 |
| Thermal Conductivity | 2.37E+02 | 2.37E+02 |
| Static Entropy | 0.00E+00 | 0.00E+00 |
| Temperature | 2.98E+02 | 2.98E+02 |
| Static Enthalpy | -3.12E-02 | 3.12E-02 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| CPU Requirements of Numerical Solution |
+--------------------------------------------------------------------+

Subsystem Name Discretization Linear Solution
(secs. %total) (secs. %total)
----------------------------------------------------------------------
Momentum and Mass 1.01E+00 23.9 % 3.12E-01 7.4 %
Heat Transfer - 1 7.80E-02 1.8 % 3.12E-02 0.7 %
Heat Transfer - 2 6.24E-02 1.5 % 1.56E-02 0.4 %
TurbKE and Diss.K 2.34E-01 5.5 % 1.09E-01 2.6 %
-------- ------- -------- ------
Subsystem Summary 1.39E+00 32.7 % 4.68E-01 11.0 %

Variable Updates 2.81E-01 6.6 %
File Reading 1.56E-02 0.4 %
File Writing 2.34E-01 5.5 %
Miscellaneous 1.86E+00 43.8 %
--------
Total 4.24E+00


+--------------------------------------------------------------------+
| Job Information |
+--------------------------------------------------------------------+


End of solution stage.

Orb February 9, 2012 18:39
http://img826.imageshack.us/img826/6025/cfdpost.jpg

Uploaded with ImageShack.us

ghorrocks February 9, 2012 19:53
No, the CCL is the stuff in the first section of the output file - the bit you chopped off.

But I can see you have three domains and do not appear to have any interfaces to connect them. Also your fluid domain does not have a temperature/heat equation so cannot be linked to your solid domains.

Looks like you have made some pretty basic setup errors with this simulation. I recommend you do the tutorials on conjugate heat transfer, that is ones with solid and fluid bodies coupled together.

Orb February 10, 2012 00:07
Thanks!

I actually did the Ch 17 Tutorial: Multiphase Flow in a Mixing Vessel...

It was helpful, but actually confused me quite a bit. Do you have to model fluid around the propeller and fluid inside the tank separately? That part confused me... How many components do I need to solve my problem? Just the fan, tube, and fluid... so 3 parts?

ghorrocks February 10, 2012 00:12
Do some of the rotating machinery tutorials to see how you model rotating devices.

Orb February 10, 2012 00:41
I think I have it now -- BTW Ch 17 is turbomachinery tutorial

Orb February 12, 2012 20:36
How do you create a subregion within your meshes? It looks like that's the problem I'm running into.

ghorrocks February 13, 2012 06:18
Why do you want a sub region?

Orb February 13, 2012 07:02
The CH 17 tutorial uses an impeller blade (a thin surface between the solid and blade) to create an interface for the impeller. IDK, I'm just trying to mimic the tutorial. Is there a way to do this with only using lids and an inlet/outlet boundary condition? I don't want permanent boundary condition values because I want the "fan" to do the work.

ghorrocks February 13, 2012 16:33
Also do the flow in an axial rotor/stator simulation. That will show a different approach to rotating machinery modelling.

Don't forget that if you use a momentum source approach (ie do not model the fan but only its momentum added to the flow) you can define the source term to follow the fan performance curve. This means you are not using permanent values and the fan does the "work".


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