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slight change to eval_f s

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Also added dependencies and instruction to README
This commit is contained in:
VCB Ferreira
2026-08-08 14:35:54 +02:00
parent 475560a3cc
commit 48723e7619
2 changed files with 34 additions and 9 deletions
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README.md
+24
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@@ -7,6 +7,30 @@ This simulation of the Vlasov-Poisson system dimensions uses
______________________________________________________________________
# How to use
## Dependencies:
- [deal.ii](https://dealii.org/) >= 9.6.0
- OpenMP
- [perf](https://perfwiki.github.io/main/) + [flameGraph](https://github.com/brendangregg/FlameGraph) (optional)
After cloning the repo to your machine `cd` into it and run:
```
mkdir -p build; cd build/
cmake ..
make
cd ..
```
Then check/change `parameters.lua` and run with `./build/nufi_poisson`.
If you want to run with a [FlameGraph](https://www.brendangregg.com/flamegraphs.html) visualization at the end use `./run`.
______________________________________________________________________
# Further description
dimensions: 1x1v
status: builds, runs
src/nufi_solver.cc
+10 -9
View File
@@ -32,6 +32,7 @@ std::vector<double> NuFISolver::eval_ftilda(
const std::vector<SolutionSnapshot<1>> &phi_history) const {
size_t x_size = X.size();
const double dt = Parameters::DT;
std::vector<double> U(x_size, u);
std::vector<double> results(x_size);
@@ -47,7 +48,7 @@ std::vector<double> NuFISolver::eval_ftilda(
// We omit the initial half-step.
while (--n) {
for (size_t i = 0; i < x_size; ++i)
X[i] = X[i] - Parameters::DT * U[i];
X[i] = X[i] - dt * U[i];
AssertThrow(
phi_history[n].solution.size() ==
@@ -68,13 +69,13 @@ std::vector<double> NuFISolver::eval_ftilda(
for (size_t i = 0; i < x_size; ++i) {
Ex[i] = -tmp[i];
U[i] = U[i] + Parameters::DT * Ex[i];
U[i] = U[i] + dt * Ex[i];
}
}
// The final half-step.
for (size_t i = 0; i < x_size; ++i)
X[i] = X[i] - Parameters::DT * U[i];
X[i] = X[i] - dt * U[i];
tmp = eval(X, grid_struct[phi_history[n].grid_version],
phi_history[n].solution); // call eval only once
@@ -92,7 +93,7 @@ std::vector<double>
NuFISolver::eval_f(unsigned int n, std::vector<double> X, double u,
const std::vector<GridStructure<1>> &grid_struct,
const std::vector<SolutionSnapshot<1>> &phi_history) const {
const double dt = Parameters::DT;
size_t x_size = X.size();
std::vector<double> U(x_size, u);
@@ -111,30 +112,30 @@ NuFISolver::eval_f(unsigned int n, std::vector<double> X, double u,
phi_history[n].solution); // call eval only once
for (size_t i = 0; i < x_size; ++i) {
Ex[i] = -tmp[i];
U[i] = U[i] + 0.5 * Parameters::DT * Ex[i];
U[i] = U[i] + 0.5 * dt * Ex[i];
}
while (--n) {
for (size_t i = 0; i < x_size; ++i)
X[i] = X[i] - Parameters::DT * U[i];
X[i] = X[i] - dt * U[i];
tmp = eval(X, grid_struct[phi_history[n].grid_version],
phi_history[n].solution); // call eval only once
for (size_t i = 0; i < x_size; ++i) {
Ex[i] = -tmp[i];
U[i] = U[i] + Parameters::DT * Ex[i];
U[i] = U[i] + dt * Ex[i];
}
}
// The final half-step.
for (size_t i = 0; i < x_size; ++i)
X[i] = X[i] - Parameters::DT * U[i];
X[i] = X[i] - dt * U[i];
tmp = eval(X, grid_struct[phi_history[n].grid_version],
phi_history[n].solution); // call eval only once
for (size_t i = 0; i < x_size; ++i) {
Ex[i] = -tmp[i];
U[i] = U[i] + 0.5 * Parameters::DT * Ex[i];
U[i] = U[i] + 0.5 * dt * Ex[i];
}
for (size_t i = 0; i < x_size; ++i)