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July 16, 2020, 06:54 |
Table bounds warnings at: END OF TIME STEP
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#1 |
Member
William
Join Date: Jun 2020
Posts: 70
Rep Power: 6 |
I am using an SCO2 RGP table that goes from 7.377MPa to 8.5 MPa. My minimum pressure in my simulation is ~7.991MPa, max is 8.025 MPa. I'm getting an out of bounds error for absolute pressure. Does this have anything to do with my reference pressure? I set it for the outlet pressure of 7.991MPa Why would it tell me out of bounds when it isn't? Everything looks to make sense in the results as far as I can tell.
Here is what the table bounds errors look like: +--------------------------------------------------------------------+ | Table bounds warnings at: END OF TIME STEP | +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ | | | Independent variables went out of bounds while computing the | | variables listed below using table interpolation. In each case | | the bounds error was handled by clipping or extrapolation. | | If this situation persists, consider increasing the table range. | | | +--------------------------------------------------------------------+ | | | Location Name : inlet_pipe_upper | | Mesh location : VERTICES | | Routine : CAL_GVar | | Partition : 1 | | Variable Name : Local Speed of Sound | | Ind. Variable : Absolute Pressure | | Bound : Lower | | Min Value : 7.9080E+04 | | Handled By : Clipping | | | +--------------------------------------------------------------------+ | | | Location Name : inlet_pipe_upper | | Mesh location : VERTICES | | Routine : CAL_GVar | | Partition : 1 | | Variable Name : Static Enthalpy | | Ind. Variable : Absolute Pressure | | Bound : Lower | | Min Value : 7.9171E+04 | | Handled By : Clipping | | | +--------------------------------------------------------------------+ .... +--------------------------------------------------------------------+ | | | Location Name : inlet_header | | Mesh location : VERTICES | | Routine : RES_UPDATE_CPL | | Partition : 17 | | Variable Name : Local Speed of Sound | | Ind. Variable : Absolute Pressure | | Bound : Lower | | Min Value : 7.8964E+04 | | Handled By : Clipping | | | +--------------------------------------------------------------------+ | | | Location Name : outlet | | Mesh location : VERTICES | | Routine : RES_UPDATE_CPL | | Partition : 12 | | Variable Name : Local Speed of Sound | | Ind. Variable : Absolute Pressure | | Bound : Lower | | Min Value : 5.7072E+04 | | Handled By : Clipping | | | +--------------------------------------------------------------------+ | | | Location Name : core | | Mesh location : VERTICES | | Routine : RES_UPDATE_CPL | | Partition : 13 | | Variable Name : Local Speed of Sound | | Ind. Variable : Absolute Pressure | | Bound : Lower | | Min Value : 7.6115E+04 | | Handled By : Clipping | | | +--------------------------------------------------------------------+ Long List of these. All saying independent variable is absolute pressure or static enthalpy. In my simulation, the inlet velocity condition is about 6 m/s. I can't understand why this error occurs, and I want to know how can I solve this error. |
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July 16, 2020, 07:27 |
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#2 |
Member
Henrique Stel
Join Date: Apr 2009
Location: Curitiba, Brazil
Posts: 93
Rep Power: 17 |
Yes, maybe you have some problems with your reference pressure, but it is hard to tell only from the error log. Could you post the beginning of your out file (the "CFX Command Language for Run" part) so we can have a look at your setup?
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July 16, 2020, 20:18 |
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#3 | |
Member
William
Join Date: Jun 2020
Posts: 70
Rep Power: 6 |
Quote:
+--------------------------------------------------------------------+ | | | CFX Command Language for Run | | | +--------------------------------------------------------------------+ LIBRARY: CEL: EXPRESSIONS: Re = density*((sqrt(u^2)+sqrt(v^2)+sqrt(w^2))/3)*0.733[mm]/viscosity END END MATERIAL: SCO2 Material Group = User Option = Pure Substance Thermodynamic State = Gas PROPERTIES: Component Name = CO2 Option = Table Table Format = TASCflow RGP Table Name = /home/jungsungsuk/SCO2RGP/SCO2.rgp 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: core Coord Frame = Coord 0 Domain Type = Porous Location = SOLID 5 BOUNDARY: core_outlet_header Side 1 Boundary Type = INTERFACE Location = OUTLET_CORE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: header_core Side 2 Boundary Type = INTERFACE Location = INLET_CORE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: wall_bottom Boundary Type = WALL Location = WALL_BOTTOM_CORE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Free Slip Wall END END END BOUNDARY: wall_side Boundary Type = WALL Location = WALL_SIDE_CORE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Free Slip Wall END END END BOUNDARY: wall_upper Boundary Type = WALL Location = WALL_UPPER_CORE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Free Slip Wall 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 = 7.991 [kPa] END END FLUID DEFINITION: Fluid 1 Material = SCO2 Option = Material Library MORPHOLOGY: Option = Continuous Fluid END END FLUID MODELS: COMBUSTION MODEL: Option = None END HEAT TRANSFER MODEL: Fluid Temperature = 76.2 [C] Option = Isothermal END THERMAL RADIATION MODEL: Option = None END TURBULENCE MODEL: Option = SST END TURBULENT WALL FUNCTIONS: Option = Automatic END END POROSITY MODELS: AREA POROSITY: Option = Isotropic END LOSS MODEL: Loss Velocity Type = True Velocity Option = Isotropic Loss ISOTROPIC LOSS MODEL: Option = Permeability and Loss Coefficient Resistance Loss Coefficient = (0.79*ln(Re)-1.64)^(-2)/0.733[mm] END END VOLUME POROSITY: Option = Value Volume Porosity = 0.1004021027 END END END DOMAIN: inlet_header Coord Frame = Coord 0 Domain Type = Fluid Location = SOLID 3 BOUNDARY: bottompipe_header Side 2 Boundary Type = INTERFACE Location = INLET_BOTTOM_INLETHEADER BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: header_core Side 1 Boundary Type = INTERFACE Location = OUTLET_INTERFACE_INLETHEADER BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: upperpipe_header Side 2 Boundary Type = INTERFACE Location = INLET_UPPER_INLETHEADER BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: wall_inlet_header Boundary Type = WALL Location = WALL_OUTER_INLETHEADER 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: Option = Stationary END MESH DEFORMATION: Option = None END REFERENCE PRESSURE: Reference Pressure = 7.991 [kPa] END END FLUID DEFINITION: Fluid 1 Material = SCO2 Option = Material Library MORPHOLOGY: Option = Continuous Fluid END END FLUID MODELS: COMBUSTION MODEL: Option = None END HEAT TRANSFER MODEL: Fluid Temperature = 76.2 [C] Option = Isothermal END THERMAL RADIATION MODEL: Option = None END TURBULENCE MODEL: Option = SST END TURBULENT WALL FUNCTIONS: Option = Automatic END END END DOMAIN: inlet_pipe_bottom Coord Frame = Coord 0 Domain Type = Fluid Location = SOLID BOUNDARY: bottompipe_header Side 1 Boundary Type = INTERFACE Location = OUTLET_BOTTOM_PIPE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: inlet_inlet_pipe_bottom Boundary Type = INLET Location = INLET_BOTTOM_PIPE BOUNDARY CONDITIONS: FLOW DIRECTION: Option = Normal to Boundary Condition END FLOW REGIME: Option = Subsonic END MASS AND MOMENTUM: Mass Flow Rate = 6.275 [kg s^-1] Mass Flow Rate Area = As Specified Option = Mass Flow Rate END TURBULENCE: Option = Medium Intensity and Eddy Viscosity Ratio END END END BOUNDARY: wall_inlet_pipe_bottom Boundary Type = WALL Location = WALL_BOTTOM_PIPE 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: Option = Stationary END MESH DEFORMATION: Option = None END REFERENCE PRESSURE: Reference Pressure = 7.991 [kPa] END END FLUID DEFINITION: Fluid 1 Material = SCO2 Option = Material Library MORPHOLOGY: Option = Continuous Fluid END END FLUID MODELS: COMBUSTION MODEL: Option = None END HEAT TRANSFER MODEL: Fluid Temperature = 76.2 [C] Option = Isothermal END THERMAL RADIATION MODEL: Option = None END TURBULENCE MODEL: Option = SST END TURBULENT WALL FUNCTIONS: Option = Automatic END END END DOMAIN: inlet_pipe_upper Coord Frame = Coord 0 Domain Type = Fluid Location = SOLID 2 BOUNDARY: inlet_inlet_pipe_header Boundary Type = INLET Location = INLET_UPPER_PIPE BOUNDARY CONDITIONS: FLOW DIRECTION: Option = Normal to Boundary Condition END FLOW REGIME: Option = Subsonic END MASS AND MOMENTUM: Mass Flow Rate = 6.275 [kg s^-1] Mass Flow Rate Area = As Specified Option = Mass Flow Rate END TURBULENCE: Option = Medium Intensity and Eddy Viscosity Ratio END END END BOUNDARY: upperpipe_header Side 1 Boundary Type = INTERFACE Location = OUTLET_UPPER_PIPE BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: wall_inlet_pipe_header Boundary Type = WALL Location = WALL_UPPER_PIPE 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: Option = Stationary END MESH DEFORMATION: Option = None END REFERENCE PRESSURE: Reference Pressure = 7.991 [kPa] END END FLUID DEFINITION: Fluid 1 Material = SCO2 Option = Material Library MORPHOLOGY: Option = Continuous Fluid END END FLUID MODELS: COMBUSTION MODEL: Option = None END HEAT TRANSFER MODEL: Fluid Temperature = 76.2 [C] Option = Isothermal END THERMAL RADIATION MODEL: Option = None END TURBULENCE MODEL: Option = SST END TURBULENT WALL FUNCTIONS: Option = Automatic END END END DOMAIN: outlet Coord Frame = Coord 0 Domain Type = Fluid Location = SOLID 4 BOUNDARY: core_outlet_header Side 2 Boundary Type = INTERFACE Location = INLET_OUTLET_HEADER BOUNDARY CONDITIONS: MASS AND MOMENTUM: Option = Conservative Interface Flux END TURBULENCE: Option = Conservative Interface Flux END END END BOUNDARY: outlet_outlet_header Boundary Type = OUTLET Location = OUTLET_OUTLET_PIPE BOUNDARY CONDITIONS: FLOW REGIME: Option = Subsonic END MASS AND MOMENTUM: Option = Average Static Pressure Pressure Profile Blend = 0.05 Relative Pressure = 0 [Pa] END PRESSURE AVERAGING: Option = Average Over Whole Outlet END END END BOUNDARY: wall Boundary Type = WALL Location = \ WALL_UPPER_OUTLET_HEADER,WALL_OUTER_OUTLET_HEADER, WALL_OUTER_OUTLET_P\ IPE 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: Option = Stationary END MESH DEFORMATION: Option = None END REFERENCE PRESSURE: Reference Pressure = 7.991 [kPa] END END FLUID DEFINITION: Fluid 1 Material = SCO2 Option = Material Library MORPHOLOGY: Option = Continuous Fluid END END FLUID MODELS: COMBUSTION MODEL: Option = None END HEAT TRANSFER MODEL: Fluid Temperature = 76.2 [C] Option = Isothermal END THERMAL RADIATION MODEL: Option = None END TURBULENCE MODEL: Option = SST END TURBULENT WALL FUNCTIONS: Option = Automatic END END END DOMAIN INTERFACE: bottompipe_header Boundary List1 = bottompipe_header Side 1 Boundary List2 = bottompipe_header Side 2 Interface Type = Fluid Fluid INTERFACE MODELS: Option = General Connection FRAME CHANGE: Option = None END MASS AND MOMENTUM: Option = Conservative Interface Flux MOMENTUM INTERFACE MODEL: Option = None END END PITCH CHANGE: Option = None END END MESH CONNECTION: Option = GGI END END DOMAIN INTERFACE: core_outlet_header Boundary List1 = core_outlet_header Side 1 Boundary List2 = core_outlet_header Side 2 Interface Type = Fluid Porous INTERFACE MODELS: Option = General Connection FRAME CHANGE: Option = None END MASS AND MOMENTUM: Option = Conservative Interface Flux MOMENTUM INTERFACE MODEL: Option = None END END PITCH CHANGE: Option = None END END MESH CONNECTION: Option = GGI END END DOMAIN INTERFACE: header_core Boundary List1 = header_core Side 1 Boundary List2 = header_core Side 2 Interface Type = Fluid Porous INTERFACE MODELS: Option = General Connection FRAME CHANGE: Option = None END MASS AND MOMENTUM: Option = Conservative Interface Flux MOMENTUM INTERFACE MODEL: Option = None END END PITCH CHANGE: Option = None END END MESH CONNECTION: Option = GGI END END DOMAIN INTERFACE: upperpipe_header Boundary List1 = upperpipe_header Side 1 Boundary List2 = upperpipe_header Side 2 Interface Type = Fluid Fluid INTERFACE MODELS: Option = General Connection FRAME CHANGE: Option = None END MASS AND MOMENTUM: Option = Conservative Interface Flux MOMENTUM INTERFACE MODEL: Option = None END END PITCH CHANGE: Option = None END END MESH CONNECTION: Option = GGI END END OUTPUT CONTROL: MONITOR OBJECTS: MONITOR BALANCES: Option = Full END MONITOR FORCES: Option = Full END MONITOR PARTICLES: Option = Full END MONITOR POINT: bottom inlet P Cartesian Coordinates = 0 [m], -1.135 [m], 0.0972 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Absolute Pressure MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR POINT: bottom inlet u Cartesian Coordinates = 0 [m], -1.135 [m], 0.0972 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Vorticity MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR POINT: outlet P Cartesian Coordinates = 0 [m], -0.3175 [m], -1.333 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Absolute Pressure MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR POINT: outlet u Cartesian Coordinates = 0 [m], -0.3175 [m], -1.333 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Velocity MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR POINT: up inlet P Cartesian Coordinates = 0 [m], 0.5 [m], 0.0972 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Absolute Pressure MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR POINT: up inlet u Cartesian Coordinates = 0 [m], 0.5 [m], 0.0972 [m] Coord Frame = Coord 0 Option = Cartesian Coordinates Output Variables List = Velocity MONITOR LOCATION CONTROL: Interpolation Type = Nearest Vertex END POSITION UPDATE FREQUENCY: Option = Initial Mesh Only END END MONITOR RESIDUALS: Option = Full END MONITOR TOTALS: Option = Full END END RESULTS: File Compression Level = Default Option = Standard END END SOLVER CONTROL: Turbulence Numerics = First Order ADVECTION SCHEME: Option = High Resolution END CONVERGENCE CONTROL: Length Scale Option = Conservative Maximum Number of Iterations = 100000 Minimum Number of Iterations = 1000 Timescale Control = Auto Timescale Timescale Factor = 1.0 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 = 16.2 Results Version = 16.2 END SIMULATION CONTROL: EXECUTION CONTROL: EXECUTABLE SELECTION: Double Precision = Yes END PARALLEL HOST LIBRARY: HOST DEFINITION: node07 Host Architecture String = linux-amd64 Installation Root = /APP/ansys_inc/v%v/CFX END END PARTITIONER STEP CONTROL: PARTITIONING TYPE: Option = MeTiS MeTiS Type = k-way Partition Size Rule = Automatic Partition Weight Factors = 0.08333, 0.08333, 0.08333, 0.08333, \ 0.08333, 0.08333, 0.08333, 0.08333, 0.08333, 0.08333, 0.08333, \ 0.08333 END END RUN DEFINITION: Solver Input File = \ /home/jungsungsuk/Airfoil_total_practice_2/1-4.inlet_to_outlet_straig\ ht.def Run Mode = Full Solver Results File = \ /home/jungsungsuk/Airfoil_total_practice_2/i1-4inlet_to_outlet_straig\ ht_001.res END SOLVER STEP CONTROL: PARALLEL ENVIRONMENT: Start Method = Platform MPI Local Parallel Number of Processes = 12 Parallel Host List = node07*12 END END END END |
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July 16, 2020, 20:44 |
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#4 |
Member
Henrique Stel
Join Date: Apr 2009
Location: Curitiba, Brazil
Posts: 93
Rep Power: 17 |
Your reference pressure (7.991 [kPa]) is quite low for the range of your table (7.377MPa to 8.5 MPa), and I don't see any non-zero relative pressure being set anywhere; there is a 0 [Pa] pressure set at OUTLET_OUTLET_PIPE. If the absolute pressure at OUTLET_OUTLET_PIPE should be 7.991MPa, so my advice is to set your reference pressure to 7.991MPa (not 7.991 [kPa]) and keep the relative pressure at OUTLET_OUTLET_PIPE at 0 [Pa].
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July 16, 2020, 23:44 |
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#5 |
Member
William
Join Date: Jun 2020
Posts: 70
Rep Power: 6 |
Oh, I had a mistake.
Thank you very much! |
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