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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 / "plate"
U_REF = 10.0
NU = 1.5e-5
STATION = 0.5
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 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 patch_vectors(path: Path, patch_name: str) -> list[tuple[float, float, float]]:
text = read(path)
header = named_block(text, "FoamFile")
patch_block = patch(text, patch_name)
match = re.search(
r"\bvalue\s+nonuniform\s+List<vector>\s+(\d+)\s*\((.*?)\)\s*;",
patch_block,
re.S,
)
if not match:
raise ValueError(f"missing {patch_name} vectors")
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 all(
len(value) == 3 and all(math.isfinite(item) for item in value)
for value in values
)
or not has_entry(header, "format", r"ascii")
or not has_entry(header, "class", r"volVectorField")
or not has_entry(header, "object", re.escape(path.name))
):
raise ValueError(f"{patch_name} vector count mismatch")
return values
def downstream_station_sample(rows: list[tuple[float, ...]]) -> tuple[float, ...]:
candidates = [row for row in rows if row[0] >= STATION]
if not candidates:
raise ValueError("missing downstream station sample")
return min(candidates, key=lambda row: (abs(row[0] - STATION), row[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")
momentum = read(CASE / "constant/momentumTransport")
control = read(CASE / "system/controlDict")
schemes = read(CASE / "system/fvSchemes")
return all(
(
"(-0.2 0 0)" in mesh,
"(1 0.2 0)" in mesh,
"(40 60 1)" in mesh,
"(200 60 1)" in mesh,
mesh.count("simpleGrading (1 50 1)") == 2,
has_entry(named_block(mesh, "upstreamBottom"), "type", r"symmetryPlane"),
has_entry(named_block(mesh, "plate"), "type", r"wall"),
has_entry(named_block(mesh, "frontAndBack"), "type", r"empty"),
all(has_entry(patch(velocity, name), "value", r"uniform\s+\(10(?:\.0+)?\s+0(?:\.0+)?\s+0(?:\.0+)?\)") for name in ("inlet", "freeStream")),
has_entry(patch(velocity, "outlet"), "type", r"zeroGradient"),
has_entry(patch(velocity, "upstreamBottom"), "type", r"symmetryPlane"),
has_entry(patch(velocity, "plate"), "type", r"noSlip"),
has_entry(patch(velocity, "frontAndBack"), "type", r"empty"),
has_entry(patch(pressure, "outlet"), "type", r"fixedValue"),
has_entry(patch(pressure, "outlet"), "value", r"uniform\s+0(?:\.0+)?"),
has_entry(patch(pressure, "upstreamBottom"), "type", r"symmetryPlane"),
has_entry(patch(pressure, "frontAndBack"), "type", r"empty"),
re.search(r"\bnu\s+\[0 2 -1 0 0 0 0\]\s+1\.5e-?5\s*;", physical, re.I)
is not None,
"simulationType laminar;" in momentum,
re.search(r"\bendTime\s+2000\s*;", control) is not None,
re.search(r"\bwriteInterval\s+2000\s*;", control) is not None,
"div(phi,U) bounded Gauss linearUpwind grad(U);" in schemes,
)
)
def check() -> bool:
required = (
ROOT / "build_case.py",
ROOT / "postprocess.py",
ROOT / "summary.txt",
ROOT / "plate_shear.csv",
CASE / "log.blockMesh",
CASE / "log.simpleFoam",
CASE / "log.cellCentres",
CASE / "log.wallShearStress",
CASE / "2000/C",
CASE / "2000/U",
CASE / "2000/p",
CASE / "2000/wallShearStress",
)
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",
("plate", "blockMeshDict", "controlDict", "fvSchemes", "fvSolution", "0/U", "0/p"),
):
return False
if not python_script_is_valid(
ROOT / "postprocess.py",
("plate", "2000", "wallShearStress", "plate_shear.csv", "summary.txt", "STATION"),
):
return False
solve_log = read(CASE / "log.simpleFoam")
if any(not log_finished(path) for path in (CASE / "log.blockMesh", CASE / "log.cellCentres", CASE / "log.wallShearStress")):
return False
if not log_finished(CASE / "log.simpleFoam") or "Time = 2000" not in solve_log:
return False
mesh_check = subprocess.run(
["bash", "-lc", ". /opt/openfoam11/etc/bashrc && checkMesh -case /home/user/Desktop/plate"],
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
centres_internal = internal_field(CASE / "2000/C", "vector")
velocity = internal_field(CASE / "2000/U", "vector")
pressure = internal_field(CASE / "2000/p", "scalar")
if not (len(centres_internal) == len(velocity) == len(pressure) == 14400):
return False
centres = patch_vectors(CASE / "2000/C", "plate")
shear = patch_vectors(CASE / "2000/wallShearStress", "plate")
if len(centres) != 200 or len(shear) != 200:
return False
calculated = []
for centre, stress in sorted(zip(centres, shear), key=lambda item: item[0][0]):
x = centre[0]
tau_x = stress[0]
cf = 2.0 * abs(tau_x) / U_REF**2
theory = 0.664 / math.sqrt(U_REF * x / NU)
error_percent = abs(cf - theory) / theory * 100.0
calculated.append((x, tau_x, cf, theory, error_percent))
sample = downstream_station_sample(calculated)
if abs(sample[0] - STATION) > 0.003 or not (8e-4 < sample[2] < 1.5e-3 and sample[4] <= 15.0):
return False
keys = ("x_m", "wall_shear_kinematic_m2ps2", "cf", "blasius_cf", "error_percent")
with (ROOT / "plate_shear.csv").open(encoding="utf-8", newline="") as stream:
rows = list(csv.DictReader(stream))
if len(rows) != 200 or set(rows[0]) != set(keys):
return False
for row, expected in zip(rows, calculated):
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 = [item.strip() for item in read(ROOT / "summary.txt").strip().split(",")]
if len(values) != 2:
return False
reported = tuple(float(value) for value in values)
return all(math.isfinite(value) for value in reported) and all(
abs(actual - expected) <= 5.0e-7
for actual, expected in zip(reported, (sample[2], sample[4]))
)
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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