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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 / "cylinder"
COEFFICIENTS = CASE / "postProcessing/forces/0/forceCoeffs.dat"
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 patch(text: str, name: str) -> str:
return named_block(named_block(text, "boundaryField"), name)
def face_count(block: str) -> int:
match = re.search(r"\bfaces\s*\((.*?)\)\s*;", block, re.S)
return len(re.findall(r"\([^()]+\)", match.group(1))) if match else 0
def internal_field(path: Path, kind: str) -> list:
text = read(path)
header = named_block(text, "FoamFile")
match = re.search(
rf"internalField\s+nonuniform\s+List<{kind}>\s+(\d+)\s*\((.*?)\)\s*;",
text,
re.S,
)
if not match:
raise ValueError(f"missing {kind} field")
if kind == "vector":
values = [
tuple(float(value) for value in item.split())
for item in re.findall(r"\(([^()]+)\)", match.group(2))
]
valid_values = all(
len(value) == 3 and all(math.isfinite(item) for item in value)
for value in values
)
elif kind == "scalar":
values = [float(value) for value in match.group(2).split()]
valid_values = all(math.isfinite(value) for value in values)
else:
raise ValueError(f"unsupported field kind {kind}")
if (
len(values) != int(match.group(1))
or not values
or not valid_values
or not has_entry(header, "format", r"ascii")
or not has_entry(header, "class", rf"vol{kind.capitalize()}Field")
or not has_entry(header, "object", re.escape(path.name))
):
raise ValueError(f"invalid {kind} field")
return values
def coefficient_history() -> list[tuple[float, float, float]]:
values = []
header = None
for line in read(COEFFICIENTS).splitlines():
stripped = line.strip()
if stripped.startswith("# Time"):
header = " ".join(stripped.split())
continue
if not stripped or stripped.startswith("#"):
continue
row = [float(value) for value in stripped.split()]
if len(row) >= 4:
values.append((row[0], row[2], row[3]))
if header != "# Time Cm Cd Cl Cl(f) Cl(r)":
raise ValueError("unexpected OpenFOAM 11 forceCoeffs header")
return values
def history_is_complete(history: list[tuple[float, float, float]]) -> bool:
if len(history) != 8001:
return False
return all(
close(time, index * 0.0025, 5.0e-10)
and math.isfinite(cd)
and math.isfinite(cl)
for index, (time, cd, cl) in enumerate(history)
)
def check_case() -> bool:
mesh = read(CASE / "system/blockMeshDict")
velocity = read(CASE / "0/U")
pressure = read(CASE / "0/p")
physical = read(CASE / "constant/physicalProperties")
momentum = read(CASE / "constant/momentumTransport")
control = read(CASE / "system/controlDict")
schemes = read(CASE / "system/fvSchemes")
solution = read(CASE / "system/fvSolution")
mesh_boundary = mesh
forces = named_block(named_block(control, "functions"), "forces")
pimple = named_block(solution, "PIMPLE")
return all(
(
mesh.count("hex (") == 8,
mesh.count("(40 12 1)") == 8,
mesh.count("simpleGrading (10 1 1)") == 8,
mesh.count("arc ") == 32,
face_count(named_block(mesh_boundary, "inlet")) == 4,
face_count(named_block(mesh_boundary, "outlet")) == 4,
face_count(named_block(mesh_boundary, "cylinder")) == 8,
has_entry(named_block(mesh_boundary, "cylinder"), "type", r"wall"),
has_entry(named_block(mesh_boundary, "frontAndBack"), "type", r"empty"),
"internalField uniform (1 0.01 0);" in velocity,
has_entry(patch(velocity, "inlet"), "value", r"uniform\s+\(1(?:\.0+)?\s+0(?:\.0+)?\s+0(?:\.0+)?\)"),
has_entry(patch(velocity, "outlet"), "type", r"zeroGradient"),
has_entry(patch(velocity, "cylinder"), "type", r"noSlip"),
has_entry(patch(velocity, "frontAndBack"), "type", r"empty"),
has_entry(patch(pressure, "inlet"), "type", r"zeroGradient"),
has_entry(patch(pressure, "outlet"), "type", r"fixedValue"),
has_entry(patch(pressure, "outlet"), "value", r"uniform\s+0(?:\.0+)?"),
has_entry(patch(pressure, "frontAndBack"), "type", r"empty"),
re.search(r"\bnu\s+\[0 2 -1 0 0 0 0\]\s+1e-?3\s*;", physical, re.I)
is not None,
"simulationType laminar;" in momentum,
re.search(r"\bendTime\s+20\s*;", control) is not None,
re.search(r"\bdeltaT\s+0\.0025\s*;", control) is not None,
re.search(r"\bwriteFormat\s+ascii\s*;", control) is not None,
has_entry(named_block(schemes, "divSchemes"), "div(phi,U)", r"bounded\s+Gauss\s+linearUpwind\s+grad\(U\)"),
has_entry(pimple, "nOuterCorrectors", r"1"),
has_entry(pimple, "nCorrectors", r"2"),
has_entry(forces, "type", r"forceCoeffs"),
has_entry(forces, "writeControl", r"timeStep"),
has_entry(forces, "writeInterval", r"1"),
has_entry(forces, "patches", r"\(\s*cylinder\s*\)"),
has_entry(forces, "rhoInf", r"1(?:\.0+)?"),
has_entry(forces, "magUInf", r"1(?:\.0+)?"),
has_entry(forces, "lRef", r"0\.1"),
has_entry(forces, "Aref", r"0\.001"),
has_entry(forces, "dragDir", r"\(1(?:\.0+)?\s+0(?:\.0+)?\s+0(?:\.0+)?\)"),
has_entry(forces, "liftDir", r"\(0(?:\.0+)?\s+1(?:\.0+)?\s+0(?:\.0+)?\)"),
)
)
def check() -> bool:
required = (
ROOT / "build_case.py",
ROOT / "postprocess.py",
ROOT / "summary.txt",
ROOT / "lift_history.csv",
CASE / "log.blockMesh",
CASE / "log.pimpleFoam",
CASE / "20/U",
CASE / "20/p",
COEFFICIENTS,
)
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",
("cylinder", "blockMeshDict", "controlDict", "forceCoeffs", "0/U", "0/p"),
):
return False
if not python_script_is_valid(
ROOT / "postprocess.py",
("forceCoeffs.dat", "lift_history.csv", "summary.txt", "zero_crossings", "cl_rms"),
):
return False
solve_log = read(CASE / "log.pimpleFoam")
if not log_finished(CASE / "log.blockMesh") or not log_finished(CASE / "log.pimpleFoam") or "Time = 20" not in solve_log:
return False
mesh_check = subprocess.run(
["bash", "-lc", ". /opt/openfoam11/etc/bashrc && checkMesh -case /home/user/Desktop/cylinder"],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
timeout=120,
)
if mesh_check.returncode != 0 or "Mesh OK." not in mesh_check.stdout or not check_case():
return False
velocity = internal_field(CASE / "20/U", "vector")
pressure = internal_field(CASE / "20/p", "scalar")
if not (len(velocity) == len(pressure) == 3840):
return False
history = coefficient_history()
if not history_is_complete(history):
return False
window = [row for row in history if 10.0 <= row[0] <= 20.0]
cl_mean = sum(row[2] for row in window) / len(window)
cl_rms = math.sqrt(sum((row[2] - cl_mean) ** 2 for row in window) / len(window))
zero_crossings = sum(
(left[2] - cl_mean) * (right[2] - cl_mean) < 0
for left, right in zip(window, window[1:])
)
cl_max = max(abs(row[2]) for row in window)
if not (0.05 < cl_max < 3.0 and cl_rms > 0.05 and zero_crossings >= 5):
return False
keys = ("time_s", "cd", "cl")
with (ROOT / "lift_history.csv").open(encoding="utf-8", newline="") as stream:
rows = list(csv.DictReader(stream))
if len(rows) != len(history) or set(rows[0]) != set(keys):
return False
for row, expected in zip(rows, history):
actual = tuple(float(row[key]) for key in keys)
if any(not close(a, b, 5.0e-7) for a, b in zip(actual, expected)):
return False
values = [line.strip() for line in read(ROOT / "summary.txt").splitlines() if line.strip()]
if len(values) != 1:
return False
reported = float(values[0])
return math.isfinite(reported) and abs(reported - cl_max) <= 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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