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Setting rotating frame of referece.

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Old   October 27, 2014, 10:19
Default Setting rotating frame of referece.
  #1
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Rolando Figueiredo
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Hello!

I'd like to ask a few insights on my setup for a rotating impeller,as seen on the image:

http://s13.postimg.org/hzakt4dmf/image.jpg

Let's go over each domain and boundaries/interfaces:

DOMAIN ANEL

Continuous fluid, 1MPa reference pressure, Stationary, Shear Stress Transport

Anel_walls: non slip smooth wall
Outlet: Average static pressure 7.6MPa/PPres. Profile Blend 0.05
Domain interface 2 side 2: interface, conservative interface flux

DOMAIN DUTO

Continuous fluid, 1MPa reference pressure, Stationary, Shear Stress Transport
Duto_walls: non slip smooth wall
Inlet: Mass Flow rate 14kg/s/Normal to boundary/Zero gradient turbulence
Domain interface 1 side 1: Conservatice Interface Flux

DOMAIN IMPELIDOR

Continuous fluid, Reference 1MPa, Rotating -24000rpm about global Y
Domain interface 1 side 2: conservative interface flux
Domain interface 2 side 2: conservative interface flux
Imp_walls: Frame type rotating, no slip smooth wall

INTERFACES
Domain interface 1: General connection, Frozen rotor, Pitch ratio 1
Domain interface 2: General connection, Frozen rotor, Pitch ratio 1

About solver control, timestep is set to physical, 4.167e-6s. So, is there something too wrong? bacause the solver refuses to run over iteration 1! Any input would be appreciated.

Thank you in advance!
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Old   October 27, 2014, 17:25
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Glenn Horrocks
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ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Please post your output file.

Also note that it appears you could model this with a single rotating domain, and no stationary domains. Then there is no need for interfaces.
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Old   October 28, 2014, 05:58
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Rolando Figueiredo
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I realize I could avoid the interfaces. I tried it with the single RFR, but it wouldn't work, so I added the stationary as I will eventually have to model the volute (once I figure out the issue).

Here's the out file:

This run of the CFX-14.0 Solver started at 07:56:04 on 28 Oct 2014 by
user Rolando on ROLANDO-PC (intel_xeon64.sse2_winnt) using the command:

"C:\Program Files\ANSYS Inc\v140\CFX\bin\perllib\cfx5solve.pl"
-stdout-comms -batch -ccl -

Setting up CFX Solver run ...


+--------------------------------------------------------------------+
| |
| CFX Command Language for Run |
| |
+--------------------------------------------------------------------+

LIBRARY:
MATERIAL: Water
Material Description = Water (liquid)
Material Group = Water Data, Constant Property Liquids
Option = Pure Substance
Thermodynamic State = Liquid
PROPERTIES:
Option = General Material
EQUATION OF STATE:
Density = 997.0 [kg m^-3]
Molar Mass = 18.02 [kg kmol^-1]
Option = Value
END
SPECIFIC HEAT CAPACITY:
Option = Value
Specific Heat Capacity = 4181.7 [J kg^-1 K^-1]
Specific Heat Type = Constant Pressure
END
REFERENCE STATE:
Option = Specified Point
Reference Pressure = 1 [atm]
Reference Specific Enthalpy = 0.0 [J/kg]
Reference Specific Entropy = 0.0 [J/kg/K]
Reference Temperature = 25 [C]
END
DYNAMIC VISCOSITY:
Dynamic Viscosity = 8.899E-4 [kg m^-1 s^-1]
Option = Value
END
THERMAL CONDUCTIVITY:
Option = Value
Thermal Conductivity = 0.6069 [W m^-1 K^-1]
END
ABSORPTION COEFFICIENT:
Absorption Coefficient = 1.0 [m^-1]
Option = Value
END
SCATTERING COEFFICIENT:
Option = Value
Scattering Coefficient = 0.0 [m^-1]
END
REFRACTIVE INDEX:
Option = Value
Refractive Index = 1.0 [m m^-1]
END
THERMAL EXPANSIVITY:
Option = Value
Thermal Expansivity = 2.57E-04 [K^-1]
END
END
END
END
FLOW: Flow Analysis 1
SOLUTION UNITS:
Angle Units = [rad]
Length Units = [m]
Mass Units = [kg]
Solid Angle Units = [sr]
Temperature Units = [K]
Time Units = [s]
END
ANALYSIS TYPE:
Option = Steady State
EXTERNAL SOLVER COUPLING:
Option = None
END
END
DOMAIN: Anel
Coord Frame = Coord 0
Domain Type = Fluid
Location = LIVE
BOUNDARY: Anel_walls
Boundary Type = WALL
Location = WALLS 2
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
END
BOUNDARY: Domain Interface 2 Side 2
Boundary Type = INTERFACE
Location = INLET 2
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: Outlet
Boundary Type = OUTLET
Location = OUTLET 2
BOUNDARY CONDITIONS:
FLOW REGIME:
Option = Subsonic
END
MASS AND MOMENTUM:
Option = Average Static Pressure
Pressure Profile Blend = 0.05
Relative Pressure = 7.6 [MPa]
END
PRESSURE AVERAGING:
Option = Average Over Whole Outlet
END
END
END
DOMAIN MODELS:
BUOYANCY MODEL:
Option = Non Buoyant
END
DOMAIN MOTION:
Option = Stationary
END
MESH DEFORMATION:
Option = None
END
REFERENCE PRESSURE:
Reference Pressure = 1 [MPa]
END
END
FLUID DEFINITION: Fluid 1
Material = Water
Option = Material Library
MORPHOLOGY:
Option = Continuous Fluid
END
END
FLUID MODELS:
COMBUSTION MODEL:
Option = None
END
HEAT TRANSFER MODEL:
Fluid Temperature = 25 [C]
Option = Isothermal
END
THERMAL RADIATION MODEL:
Option = None
END
TURBULENCE MODEL:
Option = k epsilon
END
TURBULENT WALL FUNCTIONS:
Option = Scalable
END
END
END
DOMAIN: Duto
Coord Frame = Coord 0
Domain Type = Fluid
Location = SOLID
BOUNDARY: Domain Interface 1 Side 1
Boundary Type = INTERFACE
Location = OUTLET
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: Duto_walls
Boundary Type = WALL
Location = WALLS
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
END
BOUNDARY: Inlet
Boundary Type = INLET
Location = INLET
BOUNDARY CONDITIONS:
FLOW DIRECTION:
Option = Normal to Boundary Condition
END
FLOW REGIME:
Option = Subsonic
END
MASS AND MOMENTUM:
Mass Flow Rate = 14.027 [kg s^-1]
Option = Mass Flow Rate
END
TURBULENCE:
Option = Zero Gradient
END
END
END
DOMAIN MODELS:
BUOYANCY MODEL:
Option = Non Buoyant
END
DOMAIN MOTION:
Option = Stationary
END
MESH DEFORMATION:
Option = None
END
REFERENCE PRESSURE:
Reference Pressure = 1 [MPa]
END
END
FLUID DEFINITION: Fluid 1
Material = Water
Option = Material Library
MORPHOLOGY:
Option = Continuous Fluid
END
END
FLUID MODELS:
COMBUSTION MODEL:
Option = None
END
HEAT TRANSFER MODEL:
Fluid Temperature = 25 [C]
Option = Isothermal
END
THERMAL RADIATION MODEL:
Option = None
END
TURBULENCE MODEL:
Option = k epsilon
END
TURBULENT WALL FUNCTIONS:
Option = Scalable
END
END
END
DOMAIN: Impelidor
Coord Frame = Coord 0
Domain Type = Fluid
Location = CREATED_MATERIAL_10
BOUNDARY: Domain Interface 1 Side 2
Boundary Type = INTERFACE
Location = INLET 3
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: Domain Interface 2 Side 1
Boundary Type = INTERFACE
Location = OUTLET 3
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: Imp_walls
Boundary Type = WALL
Frame Type = Rotating
Location = WALLS 3
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
END
DOMAIN MODELS:
BUOYANCY MODEL:
Option = Non Buoyant
END
DOMAIN MOTION:
Angular Velocity = -24000 [rev min^-1]
Option = Rotating
AXIS DEFINITION:
Option = Coordinate Axis
Rotation Axis = Coord 0.2
END
END
MESH DEFORMATION:
Option = None
END
REFERENCE PRESSURE:
Reference Pressure = 1 [MPa]
END
END
FLUID DEFINITION: Fluid 1
Material = Water
Option = Material Library
MORPHOLOGY:
Option = Continuous Fluid
END
END
FLUID MODELS:
COMBUSTION MODEL:
Option = None
END
HEAT TRANSFER MODEL:
Fluid Temperature = 25 [C]
Option = Isothermal
END
THERMAL RADIATION MODEL:
Option = None
END
TURBULENCE MODEL:
Option = k epsilon
END
TURBULENT WALL FUNCTIONS:
Option = Scalable
END
END
END
DOMAIN INTERFACE: Domain Interface 1
Boundary List1 = Domain Interface 1 Side 1
Boundary List2 = Domain Interface 1 Side 2
Interface Type = Fluid Fluid
INTERFACE MODELS:
Option = General Connection
FRAME CHANGE:
Option = Frozen Rotor
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
MOMENTUM INTERFACE MODEL:
Option = None
END
END
PITCH CHANGE:
Option = Value
Pitch Ratio = 1
END
END
MESH CONNECTION:
Option = GGI
END
END
DOMAIN INTERFACE: Domain Interface 2
Boundary List1 = Domain Interface 2 Side 1
Boundary List2 = Domain Interface 2 Side 2
Interface Type = Fluid Fluid
INTERFACE MODELS:
Option = General Connection
FRAME CHANGE:
Option = Frozen Rotor
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
MOMENTUM INTERFACE MODEL:
Option = None
END
END
PITCH CHANGE:
Option = Value
Pitch Ratio = 1
END
END
MESH CONNECTION:
Option = GGI
END
END
OUTPUT CONTROL:
RESULTS:
File Compression Level = Default
Option = Standard
END
END
SOLVER CONTROL:
Turbulence Numerics = First Order
ADVECTION SCHEME:
Option = High Resolution
END
CONVERGENCE CONTROL:
Maximum Number of Iterations = 1000
Minimum Number of Iterations = 1
Physical Timescale = 4.16667e-006 [s]
Timescale Control = Physical Timescale
END
CONVERGENCE CRITERIA:
Residual Target = 1.E-4
Residual Type = RMS
END
DYNAMIC MODEL CONTROL:
Global Dynamic Model Control = On
END
END
END
COMMAND FILE:
Version = 14.0
Results Version = 14.0
END
SIMULATION CONTROL:
EXECUTION CONTROL:
EXECUTABLE SELECTION:
Double Precision = Off
END
INTERPOLATOR STEP CONTROL:
Runtime Priority = Standard
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
END
PARALLEL HOST LIBRARY:
HOST DEFINITION: rolandopc
Remote Host Name = ROLANDO-PC
Host Architecture String = winnt-amd64
Installation Root = C:\Program Files\ANSYS Inc\v%v\CFX
END
END
PARTITIONER STEP CONTROL:
Multidomain Option = Independent Partitioning
Runtime Priority = Standard
EXECUTABLE SELECTION:
Use Large Problem Partitioner = Off
END
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
PARTITIONING TYPE:
MeTiS Type = k-way
Option = MeTiS
Partition Size Rule = Automatic
END
END
RUN DEFINITION:
Run Mode = Full
Solver Input File = C:\Users\Rolando\Desktop\Ansys\Teste\TesteGeral.de f
END
SOLVER STEP CONTROL:
Runtime Priority = Standard
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
PARALLEL ENVIRONMENT:
Number of Processes = 1
Start Method = Serial
END
END
END
END
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Old   October 28, 2014, 05:59
Default
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Rolando Figueiredo
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+--------------------------------------------------------------------+
| |
| Solver |
| |
+--------------------------------------------------------------------+




+--------------------------------------------------------------------+
| |
| ANSYS(R) CFX(R) Solver 14.0 |
| |
| Version 2011.10.10-23.01 Tue Oct 11 00:28:38 GMTDT 2011 |
| |
| Executable Attributes |
| |
| single-int32-64bit-novc8-noifort-novc6-optimised-supfort-noprof-nos|
| |
| (C) 2011 ANSYS, Inc. |
| |
| All rights reserved. Unauthorized use, distribution or duplication |
| is prohibited. This product is subject to U.S. laws governing |
| export and re-export. For full Legal Notice, see documentation. |
+--------------------------------------------------------------------+





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

Run mode: serial run

Host computer: ROLANDO-PC (PID:2392)
Job started: Tue Oct 28 07:56:08 2014
License Cap: ANSYS CFX Solver (Max 512K Nodes)
License Cap: Multiple Reference Frames
License ID: ROLANDO-PC-SISTEMA-2200-006901


+--------------------------------------------------------------------+
| Memory Allocated for Run (Actual usage may be less) |
+--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 123622.1 369.02 94.51 482899.0 1476.09
Integer 42063.1 125.56 32.16 164308.8 502.25
Character 3695.0 11.03 2.82 3608.4 11.03
Logical 80.0 0.24 0.06 312.5 0.96
Double 1208.1 3.61 0.92 9438.1 28.85

+--------------------------------------------------------------------+
| Mesh Statistics |
+--------------------------------------------------------------------+
| Domain Name | Orthog. Angle | Exp. Factor | Aspect Ratio |
+----------------------+---------------+--------------+--------------+
| | Minimum [deg] | Maximum | Maximum |
+----------------------+---------------+--------------+--------------+
| Anel | 78.8 OK | 5 OK | 3 OK |
| Duto | 85.1 OK | 1 OK | 4 OK |
| Impelidor | 30.5 ok | 59 ! | 5 OK |
| Global | 30.5 ok | 59 ! | 5 OK |
+----------------------+---------------+--------------+--------------+
| | %! %ok %OK | %! %ok %OK | %! %ok %OK |
+----------------------+---------------+--------------+--------------+
| Anel | 0 0 100 | 0 0 100 | 0 0 100 |
| Duto | 0 0 100 | 0 0 100 | 0 0 100 |
| Impelidor | 0 <1 100 | <1 3 97 | 0 0 100 |
| Global | 0 <1 100 | <1 2 98 | 0 0 100 |
+----------------------+---------------+--------------+--------------+

Domain Name : Anel

Total Number of Nodes = 27616

Total Number of Elements = 22162
Total Number of Prisms = 434
Total Number of Hexahedrons = 21728

Total Number of Faces = 10770

Domain Name : Duto

Total Number of Nodes = 87360

Total Number of Elements = 79560
Total Number of Hexahedrons = 79560

Total Number of Faces = 15360

Domain Name : Impelidor

Total Number of Nodes = 220022

Total Number of Elements = 1206269
Total Number of Tetrahedrons = 1206269

Total Number of Faces = 73106

Global Statistics :

Global Number of Nodes = 334998

Global Number of Elements = 1307991
Total Number of Tetrahedrons = 1206269
Total Number of Prisms = 434
Total Number of Hexahedrons = 101288

Global Number of Faces = 99236

Domain Interface Name : Domain Interface 1

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 3.65E-05
Non-overlap area fraction on side 2 = 1.16E-01
Pitch ratio ( user specified ) = 1.000
Pitch angle for side 1 [degrees] = 360.000
Pitch angle for side 2 [degrees] = 360.000

Domain Interface Name : Domain Interface 2

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 7.04E-05
Non-overlap area fraction on side 2 = 1.47E-01
Pitch ratio ( user specified ) = 1.000
Pitch angle for side 1 [degrees] = 296.760
Pitch angle for side 2 [degrees] = 360.000

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Overflow |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine FPX: C_FPX_HANDLER |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 1. No results file |
| has been created. |
+--------------------------------------------------------------------+

End of solution stage.

+--------------------------------------------------------------------+
| The following user files have been saved in the directory |
| C:\Users\Rolando\Desktop\Ansys\Teste\TesteGeral_00 1: |
| |
| mon |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.
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