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Running the C++ solver

The project is intended to be run from a Linux-style terminal. On Windows, WSL is recommended.

Build only

bash scripts/build.sh

This creates the executable:

bin/lid_cavity

Smoke test

Run this first after cloning the repository:

bash scripts/run_smoke_test.sh

The smoke test uses a very small setup. It is only meant to check that the code compiles and writes output files.

Representative case

bash scripts/run_single.sh

This runs the same case shown in the README:

N = 128
Re = 1000
scheme = central
pressure solver = RBSOR
implementation = serial_cpp

This case is useful as a visual and validation example because it uses the refined grid and the faster pressure solver.

Quick study

bash scripts/run_quick.sh

The quick study is useful after editing the solver because it runs a reduced set of meshes and Reynolds numbers.

Medium study

bash scripts/run_medium.sh

The medium study includes more Reynolds-number coverage but avoids the largest mesh.

Full study

bash scripts/run_full.sh

The full C++ study runs 36 cases:

3 meshes × 3 Reynolds numbers × 2 convection schemes × 2 pressure solvers × 1 serial C++ implementation

This can take several hours depending on the CPU.

Plotting

After running one or more cases:

bash scripts/plot_results.sh

The plotting script reads the CSV files in results/data/ and writes figures to results/figures/.

Cleaning generated files

bash scripts/clean.sh

This removes the compiled binary and generated CSV files.

Output folders

results/data/       CSV outputs
results/figures/    generated figures

The repository keeps only the compact full-study summary and selected README figures. Full generated case files are ignored by Git because they can become large.