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from __future__ import annotations
import ast
import csv
import math
import re
import subprocess
from pathlib import Path
ROOT = Path("/home/user/Desktop")
CASE = ROOT / "cavity"
def read(path: Path) -> str:
return path.read_text(encoding="utf-8", errors="ignore")
def named_block(text: str, name: str) -> str:
text = re.sub(r"/\*.*?\*/|//[^\n]*", "", text, flags=re.S)
match = re.search(rf"(?m)^\s*{re.escape(name)}\s*\{{", text)
if not match:
raise ValueError(f"missing block {name}")
start = text.find("{", match.start())
depth = 0
for index in range(start, len(text)):
depth += text[index] == "{"
depth -= text[index] == "}"
if depth == 0:
return text[start + 1 : index]
raise ValueError(f"unterminated block {name}")
def has_entry(block: str, key: str, value: str) -> bool:
return re.search(rf"(?<!\w){re.escape(key)}\s+{value}\s*;", block) is not None
def close(actual: float, expected: float, tolerance: float) -> bool:
return math.isfinite(actual) and abs(actual - expected) <= tolerance
def python_script_is_valid(path: Path, required_fragments: tuple[str, ...]) -> bool:
text = read(path)
try:
tree = ast.parse(text)
except SyntaxError:
return False
return bool(tree.body) and all(fragment in text for fragment in required_fragments)
def log_finished(path: Path) -> bool:
text = read(path)
return "foam fatal" not in text.lower() and text.rstrip().endswith("End")
def vectors(path: Path) -> list[tuple[float, float, float]]:
text = read(path)
header = named_block(text, "FoamFile")
match = re.search(
r"internalField\s+nonuniform\s+List<vector>\s+(\d+)\s*\((.*?)\)\s*;",
text,
re.S,
)
if not match:
raise ValueError(f"missing vector field in {path}")
values = [
tuple(float(value) for value in item.split())
for item in re.findall(r"\(([^()]+)\)", match.group(2))
]
if (
len(values) != int(match.group(1))
or not values
or not all(len(value) == 3 and all(math.isfinite(item) for item in value) for value in values)
or not has_entry(header, "class", r"volVectorField")
or not has_entry(header, "object", re.escape(path.name))
):
raise ValueError("invalid vector field")
return values
def latest_time() -> Path:
times = sorted(
(float(path.name), path)
for path in CASE.iterdir()
if path.is_dir() and re.fullmatch(r"\d+(?:\.\d+)?", path.name)
)
if not times or abs(times[-1][0] - 30.0) > 1.0e-9:
raise ValueError("final time must be 30 s")
return times[-1][1]
def nearest(
centres: list[tuple[float, float, float]],
velocity: list[tuple[float, float, float]],
point: tuple[float, float, float],
) -> tuple[float, float, float]:
indices = sorted(
range(len(centres)),
key=lambda i: sum((centres[i][j] - point[j]) ** 2 for j in range(3)),
)[:4]
return tuple(sum(velocity[i][j] for i in indices) / 4.0 for j in range(3))
def velocity_signs_are_valid(
calculated: dict[str, tuple[float, float, float]],
) -> bool:
return (
calculated["center"][0] < 0.0
and calculated["left_mid"][1] > 0.0
and calculated["right_mid"][1] < 0.0
)
def check_case() -> bool:
mesh = read(CASE / "system/blockMeshDict")
velocity = read(CASE / "0/U")
pressure = read(CASE / "0/p")
physical = read(CASE / "constant/physicalProperties")
control = read(CASE / "system/controlDict")
schemes = read(CASE / "system/fvSchemes")
solution = read(CASE / "system/fvSolution")
u_boundary = named_block(velocity, "boundaryField")
p_boundary = named_block(pressure, "boundaryField")
moving_u = named_block(u_boundary, "movingWall")
walls_u = named_block(u_boundary, "fixedWalls")
empty_u = named_block(u_boundary, "frontAndBack")
moving_p = named_block(p_boundary, "movingWall")
walls_p = named_block(p_boundary, "fixedWalls")
empty_p = named_block(p_boundary, "frontAndBack")
piso = named_block(solution, "PISO")
return all(
(
"(1 1 0)" in mesh,
"(1 1 0.01)" in mesh,
"(50 50 1)" in mesh,
"type empty;" in mesh,
has_entry(moving_u, "type", r"fixedValue"),
has_entry(moving_u, "value", r"uniform\s+\(1(?:\.0+)?\s+0(?:\.0+)?\s+0(?:\.0+)?\)"),
has_entry(walls_u, "type", r"noSlip"),
has_entry(empty_u, "type", r"empty"),
has_entry(moving_p, "type", r"zeroGradient"),
has_entry(walls_p, "type", r"zeroGradient"),
has_entry(empty_p, "type", r"empty"),
re.search(r"\bnu\s+\[0 2 -1 0 0 0 0\]\s+1(?:\.0)?e-?3\s*;", physical, re.I)
is not None,
re.search(r"\bendTime\s+30(?:\.0)?\s*;", control) is not None,
re.search(r"\bdeltaT\s+0\.005\s*;", control) is not None,
re.search(r"\bwriteInterval\s+1000\s*;", control) is not None,
re.search(r"\bwriteFormat\s+ascii\s*;", control) is not None,
has_entry(named_block(schemes, "ddtSchemes"), "default", r"Euler"),
has_entry(named_block(schemes, "divSchemes"), "div(phi,U)", r"Gauss\s+linear"),
has_entry(piso, "pRefCell", r"0"),
has_entry(piso, "pRefValue", r"0(?:\.0+)?"),
)
)
def check() -> bool:
required = (
ROOT / "build_case.py",
ROOT / "postprocess.py",
ROOT / "summary.txt",
ROOT / "center_velocity.csv",
CASE / "log.blockMesh",
CASE / "log.icoFoam",
CASE / "log.cellCentres",
CASE / "system/blockMeshDict",
CASE / "system/controlDict",
CASE / "system/fvSchemes",
CASE / "system/fvSolution",
CASE / "constant/physicalProperties",
CASE / "0/U",
CASE / "0/p",
)
if any(not path.is_file() or path.stat().st_size == 0 for path in required):
return False
if not python_script_is_valid(
ROOT / "build_case.py",
("cavity", "blockMeshDict", "controlDict", "fvSchemes", "fvSolution", "0/U", "0/p"),
):
return False
if not python_script_is_valid(
ROOT / "postprocess.py",
("cavity", "center_velocity.csv", "summary.txt", "nearest", "30"),
):
return False
if any(not log_finished(CASE / name) for name in ("log.blockMesh", "log.icoFoam", "log.cellCentres")):
return False
mesh_check = subprocess.run(
["bash", "-lc", ". /opt/openfoam11/etc/bashrc && checkMesh -case /home/user/Desktop/cavity"],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
timeout=120,
)
if (
mesh_check.returncode != 0
or "Mesh OK." not in mesh_check.stdout
or "Failed " in mesh_check.stdout
or "foam fatal" in mesh_check.stdout.lower()
or not mesh_check.stdout.rstrip().endswith("End")
or not check_case()
):
return False
latest = latest_time()
centres = vectors(latest / "C")
velocity = vectors(latest / "U")
if len(centres) != 2500 or len(velocity) != len(centres):
return False
points = {
"center": (0.5, 0.5, 0.005),
"left_mid": (0.25, 0.5, 0.005),
"right_mid": (0.75, 0.5, 0.005),
}
calculated = {name: nearest(centres, velocity, point) for name, point in points.items()}
if not velocity_signs_are_valid(calculated):
return False
with (ROOT / "center_velocity.csv").open(encoding="utf-8", newline="") as stream:
rows = list(csv.DictReader(stream))
if [row.get("location") for row in rows] != list(points):
return False
for row in rows:
actual = tuple(float(row[key]) for key in ("ux_mps", "uy_mps", "uz_mps"))
if any(
not close(a, b, 5.0e-7)
for a, b in zip(actual, calculated[row["location"]])
):
return False
summary_lines = [line.strip() for line in read(ROOT / "summary.txt").splitlines() if line.strip()]
if len(summary_lines) != 1:
return False
reported = float(summary_lines[0])
return math.isfinite(reported) and abs(reported - calculated["center"][0]) <= 5.0e-7
def main() -> int:
try:
result = check()
except Exception:
result = False
print("True" if result else "False")
return 0
if __name__ == "__main__":
raise SystemExit(main())
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