jakob.schratter/SciFEM-Project_CoffeeMugSimulation_Celebic-Schratter
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improved setup for simulation (ii) and (iii)

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jakob.schratter 2026-01-27 09:14:25 +01:00
commit d8fc085d57
4 changed files with 5443 additions and 85 deletions
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83
solid-cpp/ownSolver.cpp
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@ -7,6 +7,7 @@
#include <cassert>
#include <chrono> // timing
#include <cmath>
#include <fstream>
#include <iostream>
#include <omp.h>
@ -76,61 +77,26 @@ int main(int argc, char **argv )
// ##########################################
// ################################## SIMULATION (i) ##################################
// Initialize temperature u_0
vector<double> uv(SK.Nrows(), 0.0); // temperature
mesh_c.Init_Solution_mult(uv, 0, [u0_mug](double x, double y) -> double { return u0_mug; }); // mug
mesh_c.Init_Solution_mult(uv, 1, [u0_fluid](double x, double y) -> double { return u0_fluid; }); // fluid
mesh_c.Init_Solution_mult(uv, 2, [u0_air](double x, double y) -> double { return u0_air; }); // air
//mesh_c.Visualize(uv);
auto t3 = system_clock::now(); // start timer
double average_cup_temperature = u0_mug;
double percentage_temp_reached = 0.0;
double goal_temp = 67.0;
double goal_perc = 60.0;
double time_count = 0;
while (average_cup_temperature < goal_temp)
// while (percentage_temp_reached < goal_perc)
//for (int step = 0; step < steps; ++step)
{
vector<double> G(Mdt.Nrows(), 0.0);
Mdt.Mult(G, uv); // G = M/dt * u_{n}
vector<double> H = fv;
for (size_t i = 0; i < Mdt.Nrows(); ++i)
{
H[i] += G[i]; // H = F + G
}
JacobiSolve(SK, H, uv); // solve: (M/dt + K + C) * u_{n+1} = F + M/dt * u_{n}
// ----- SK ----- ------ H -------
average_cup_temperature = mesh_c.AverageVectorFunction_perSubdomain(uv, 0);
percentage_temp_reached = mesh_c.CheckTemp_mult(uv, 0, goal_temp);
cout << "Average cup temperature: " << average_cup_temperature << " after " << time_count << " seconds. " << endl;
cout << "% of elements reached temperature " << goal_temp << "ºC: " << percentage_temp_reached << endl;
time_count += dt;
}
auto t4 = system_clock::now(); // stop timer
auto duration = duration_cast<microseconds>(t4 - t3); // duration in microseconds
double t_diff = static_cast<double>(duration.count()) / 1e6; // overall duration in seconds
cout << "\n\nJacobiSolve: timing in sec. : " << t_diff << endl;
mesh_c.Visualize(uv);
// ################################## SIMULATION (iii) ##################################
// read vector from simulation (i)
vector<double> uv(SK.Nrows(), 0.0);
ifstream input_file("uv_1.txt");
for (size_t i = 0; i < uv.size(); ++i)
{
input_file >> uv[i];
}
double u0_coffee = 85.0;
mesh_c.Init_Solution_mult(uv, 1, [u0_coffee](double x, double y) -> double { return u0_coffee; }); // fluid
t3 = system_clock::now(); // start timer
mesh_c.Visualize(uv);
auto t3 = system_clock::now(); // start timer
double average_coffee_temperature = u0_coffee;
percentage_temp_reached = 0.0;
double goal_temp = 50.0;
double goal_perc = 60.0;
double percentage_temp_reached = mesh_c.CheckTemp_mult(uv, 1, goal_temp);
// ------------------------ initialize preCICE ------------------------
int commRank = 0;
@ -172,9 +138,9 @@ int main(int argc, char **argv )
goal_temp = 50.0;
goal_perc = 60.0;
time_count = 0;
while (average_cup_temperature > goal_temp)
// while (percentage_temp_reached > goal_perc)
double time_count = 0;
//while (average_coffee_temperature > goal_temp)
while (percentage_temp_reached > goal_perc)
{
preciceDt = participantSolid.getMaxTimeStepSize();
solverDt = 1.0;
@ -201,9 +167,10 @@ int main(int argc, char **argv )
// ----- SK ----- ------ H -------
average_coffee_temperature = mesh_c.AverageVectorFunction_perSubdomain(uv, 1);
percentage_temp_reached = mesh_c.CheckTemp_mult(uv, 0, goal_temp);
percentage_temp_reached = mesh_c.CheckTemp_mult(uv, 1, goal_temp);
cout << "Average coffee temperature: " << average_coffee_temperature << " after " << time_count << " seconds. " << endl;
cout << "% of elements reached temperature " << goal_temp << "ºC: " << percentage_temp_reached << endl;
cout << "% of elements above temperature " << goal_temp << "ºC: " << percentage_temp_reached << endl;
time_count += dt;
// ----- write the heat-flux, so openFOAM can read it
{
@ -218,9 +185,9 @@ int main(int argc, char **argv )
time_count += dt;
}
t4 = system_clock::now(); // stop timer
duration = duration_cast<microseconds>(t4 - t3); // duration in microseconds
t_diff = static_cast<double>(duration.count()) / 1e6; // overall duration in seconds
auto t4 = system_clock::now(); // stop timer
auto duration = duration_cast<microseconds>(t4 - t3); // duration in microseconds
double t_diff = static_cast<double>(duration.count()) / 1e6; // overall duration in seconds
cout << "\n\nJacobiSolve: timing in sec. : " << t_diff << endl;