Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #include "SCMTriPowerAux.h"
      11             : #include "Function.h"
      12             : #include "TriSubChannelMesh.h"
      13             : #include "SCM.h"
      14             : 
      15             : registerMooseObject("SubChannelApp", SCMTriPowerAux);
      16             : registerMooseObjectRenamed("SubChannelApp", TriPowerAux, "06/30/2025 24:00", SCMTriPowerAux);
      17             : 
      18             : InputParameters
      19         105 : SCMTriPowerAux::validParams()
      20             : {
      21         105 :   InputParameters params = AuxKernel::validParams();
      22         105 :   params.addClassDescription(
      23             :       "Computes axial power rate (W/m) that goes into the subchannel cells "
      24             :       "or is assigned to the fuel pins, in a triangular lattice arrangement");
      25         210 :   params.addRequiredParam<PostprocessorName>(
      26             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      27         210 :   params.addRequiredParam<std::string>(
      28             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      29         210 :   params.addParam<FunctionName>("axial_heat_rate",
      30             :                                 "1.0",
      31             :                                 "user provided normalized function of axial heat rate [Unitless]. "
      32             :                                 "The integral over pin length should equal the heated length");
      33         105 :   return params;
      34           0 : }
      35             : 
      36          60 : SCMTriPowerAux::SCMTriPowerAux(const InputParameters & parameters)
      37             :   : AuxKernel(parameters),
      38         120 :     _triMesh(SCM::getConstMesh<TriSubChannelMesh>(_mesh)),
      39          60 :     _power(getPostprocessorValue("power")),
      40          60 :     _numberoflines(0),
      41         180 :     _filename(getParam<std::string>("filename")),
      42         120 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      43             : {
      44          60 :   if (processor_id() > 0)
      45          20 :     return;
      46          40 :   auto n_pins = _triMesh.getNumOfPins();
      47             :   // Matrix sizing
      48          40 :   _power_dis.resize(n_pins, 1);
      49          40 :   _power_dis.setZero();
      50          40 :   _pin_power_correction.resize(n_pins, 1);
      51          40 :   _pin_power_correction.setOnes();
      52             : 
      53             :   Real vin;
      54          40 :   std::ifstream inFile;
      55             : 
      56          40 :   inFile.open(_filename);
      57          40 :   if (!inFile)
      58           0 :     mooseError(name(), ": Unable to open file: ", _filename);
      59             : 
      60         800 :   while (inFile >> vin)
      61         760 :     _numberoflines += 1;
      62             : 
      63          40 :   if (inFile.fail() && !inFile.eof())
      64           0 :     mooseError(name(), ": Non numerical input at line: ", _numberoflines);
      65             : 
      66          40 :   if (_numberoflines != n_pins)
      67           0 :     mooseError(name(), ": Radial profile file doesn't have correct size: ", n_pins);
      68          40 :   inFile.close();
      69             : 
      70          40 :   inFile.open(_filename);
      71             :   int i = 0;
      72         800 :   while (inFile >> vin)
      73             :   {
      74         760 :     _power_dis(i, 0) = vin;
      75         760 :     i++;
      76             :   }
      77          40 :   inFile.close();
      78          40 : }
      79             : 
      80             : void
      81         120 : SCMTriPowerAux::initialSetup()
      82             : {
      83         120 :   if (processor_id() > 0)
      84          40 :     return;
      85             : 
      86          80 :   auto heated_length = _triMesh.getHeatedLength();
      87          80 :   auto sum = _power_dis.sum();
      88             :   // full (100%) power of one pin [W]
      89          80 :   auto fpin_power = _power / sum;
      90             :   // actual pin power [W]
      91          80 :   _ref_power = _power_dis * fpin_power;
      92             :   // Convert the actual pin power to a linear heat rate [W/m]
      93          80 :   _ref_qprime = _ref_power / heated_length;
      94             : 
      95          80 :   auto n_pins = _triMesh.getNumOfPins();
      96          80 :   auto nz = _triMesh.getNumOfAxialCells();
      97          80 :   auto z_grid = _triMesh.getZGrid();
      98          80 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
      99             : 
     100          80 :   _estimate_power.resize(n_pins, 1);
     101          80 :   _estimate_power.setZero();
     102        3152 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     103             :   {
     104             :     // Compute axial location of nodes.
     105        3072 :     auto z2 = z_grid[iz];
     106        3072 :     auto z1 = z_grid[iz - 1];
     107        3072 :     Point p1(0, 0, z1 - unheated_length_entry);
     108        3072 :     Point p2(0, 0, z2 - unheated_length_entry);
     109        3072 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     110        3072 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     111        3072 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     112        1856 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     113             :     {
     114             :       // cycle through pins
     115       30400 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     116             :       {
     117             :         // Compute the height of this element.
     118       28880 :         auto dz = z2 - z1;
     119             : 
     120             :         // calculation of power for the first heated segment if nodes don't align
     121       28880 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     122             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry))
     123             :         {
     124             :           heat1 = 0.0;
     125             :         }
     126             : 
     127             :         // calculation of power for the last heated segment if nodes don't align
     128       28880 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry + heated_length) &&
     129             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     130             :         {
     131             :           heat2 = 0.0;
     132             :         }
     133       28880 :         _estimate_power(i_pin) += _ref_qprime(i_pin) * (heat1 + heat2) * dz / 2.0;
     134             :       }
     135             :     }
     136             :   }
     137             : 
     138             :   // if a Pin has zero power (_ref_qprime(i_pin) = 0) then I need to avoid dividing by zero. I
     139             :   // divide by a wrong non-zero number which is not correct but this error doesn't mess things cause
     140             :   // _ref_qprime(i_pin) = 0.0
     141          80 :   auto total_power = 0.0;
     142        1600 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     143             :   {
     144        1520 :     total_power += _estimate_power(i_pin);
     145        1520 :     if (_estimate_power(i_pin) == 0.0)
     146           0 :       _estimate_power(i_pin) = 1.0;
     147             :   }
     148             :   // We need to correct the linear power assigned to the nodes of each pin
     149             :   // so that the total power calculated  by the trapezoidal rule agrees with the power assigned by
     150             :   // the user.
     151          80 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     152          80 :   _console << "###########################################" << std::endl;
     153          80 :   _console << "Total power estimation by Aux kernel before correction: " << total_power << " [W] "
     154          80 :            << std::endl;
     155          80 :   _console << "Aux Power correction vector :\n" << _pin_power_correction << " \n";
     156          80 : }
     157             : 
     158             : Real
     159       52422 : SCMTriPowerAux::computeValue()
     160             : {
     161       52422 :   Point p = *_current_node;
     162             :   auto heat_rate = 0.0;
     163       52422 :   auto heated_length = _triMesh.getHeatedLength();
     164       52422 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
     165             :   Point p1(0, 0, unheated_length_entry);
     166             :   Point P = p - p1;
     167       52422 :   auto pin_triMesh_exist = _triMesh.pinMeshExist();
     168             : 
     169             :   /// assign power to the nodes located within the heated section
     170       52422 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     171       31728 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     172             :   {
     173       24768 :     if (pin_triMesh_exist)
     174             :     {
     175             :       // project axial heat rate on pins
     176        4104 :       auto i_pin = _triMesh.getPinIndexFromPoint(p);
     177        4104 :       return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     178             :     }
     179             :     else
     180             :     {
     181             :       // Determine which subchannel this point is in.
     182       20664 :       auto i_ch = _triMesh.getSubchannelIndexFromPoint(p);
     183       20664 :       auto subch_type = _triMesh.getSubchannelType(i_ch);
     184             :       // project axial heat rate on subchannels
     185             :       {
     186             :         double factor;
     187       20664 :         switch (subch_type)
     188             :         {
     189             :           case EChannelType::CENTER:
     190             :             factor = 1.0 / 6.0;
     191             :             break;
     192        5904 :           case EChannelType::EDGE:
     193             :             factor = 1.0 / 4.0;
     194        5904 :             break;
     195             :           case EChannelType::CORNER:
     196             :             factor = 1.0 / 6.0;
     197             :             break;
     198             :           default:
     199             :             return 0.0; // handle invalid subch_type if needed
     200             :         }
     201       70848 :         for (auto i_pin : _triMesh.getChannelPins(i_ch))
     202             :         {
     203       50184 :           heat_rate += factor * _ref_qprime(i_pin) * _pin_power_correction(i_pin) *
     204       50184 :                        _axial_heat_rate.value(_t, P);
     205             :         }
     206       20664 :         return heat_rate;
     207             :       }
     208             :     }
     209             :   }
     210             :   else
     211             :     return 0.0;
     212             : }