butterfly.gradingutil module¶
-
class
butterfly.gradingutil.GradientProperties(ln, k, r, n, ds, de)¶ Bases:
tuple-
de¶ Alias for field number 5
-
ds¶ Alias for field number 4
-
k¶ Alias for field number 1
-
ln¶ Alias for field number 0
-
n¶ Alias for field number 3
-
r¶ Alias for field number 2
-
-
butterfly.gradingutil.grading_by_ds_ccratio_count(ds, k, n)[source]¶ Calculate grading properties.
Parameters: - ds – Start cell size
- k – Cell-to-cell expansion (or geometric growth ratio)
- n – Number of cells
Returns: - grading properties as a namedtuple.
ln: Total length k: Cell-to-cell expansion (or geometric growth ratio) r: Total expansion ratio (=bias factor in Ansys Meshing) n: Number of cells ds: Start cell size de: End cell size
-
butterfly.gradingutil.grading_by_length_de_ccratio(ln, de, k, min_ds=1)[source]¶ Calculate grading properties.
Parameters: - ln – Total length
- de – End cell size
- k – Cell-to-cell expansion (or geometric growth ratio)
- min_ds – Minimum size for start cell size.
Returns: - grading properties as a namedtuple.
ln: Total length k: Cell-to-cell expansion (or geometric growth ratio) r: Total expansion ratio (=bias factor in Ansys Meshing) n: Number of cells ds: Start cell size de: End cell size
-
butterfly.gradingutil.grading_by_length_ds_ccratio(ln, ds, k)[source]¶ Calculate grading properties.
Parameters: - ln – Total length
- ds – Start cell size
- k – Cell-to-cell expansion (or geometric growth ratio)
Returns: - grading properties as a namedtuple.
ln: Total length k: Cell-to-cell expansion (or geometric growth ratio) r: Total expansion ratio (=bias factor in Ansys Meshing) n: Number of cells ds: Start cell size de: End cell size
-
butterfly.gradingutil.grading_by_length_ds_de(ln, ds, de)[source]¶ Calculate grading properties.
Parameters: - ln – Total length
- ds – Start cell size
- de – End cell size
Returns: - grading properties as a namedtuple.
ln: Total length k: Cell-to-cell expansion (or geometric growth ratio) r: Total expansion ratio (=bias factor in Ansys Meshing) n: Number of cells ds: Start cell size de: End cell size
-
butterfly.gradingutil.secant(f, x0, x1, eps, ds, ln, n)[source]¶ The secant method to solve nonlinear equation to find expansion ratio.
From: http://hplgit.github.io/Programming-for-Computations/pub/p4c/p4c-sphinx-Python/ ._pylight007.html