Hi, guys
anyone can tell me what is symmetric cubic spline which is used in multi-block LBM?
where can I find reference about the kind of spline?
Hi, guys
anyone can tell me what is symmetric cubic spline which is used in multi-block LBM?
where can I find reference about the kind of spline?
hi
this is a good tutorial
http://www.physics.ge/books/1202559061Cubic%20Spline%20Tutorial.pdf
by the way I think you will get this equation
f(2.5) = 1/16 f(1) + 9/16 f(2) + 9/16 f(3) 1/16 f(4)
+-----+-----+-----+-----+-----+-----+
| | | | | | | fine mesh
+-----+-----+-----+-----+-----+-----+
| | | | | | |
f1----+-----f2---f2.5---f3----+-----f4
| | | |
| | | | coarse mesh
+-----------+-----------+-----------+
regards
Hi,SaS
It is very kind of you for giving me the material and the heuristic diagram.
In your opinion, the symmetric cubic spline is nothing but a special knots distribution. Do I understand your intention exactly?
yes you can say that
but the exat definition is:
Cubic splines are a popular choice for curve fitting for ease of data interpolation, integration, differentiation,
and they are normally very smooth
The key characteristics of cubic spline interpolation are:
1. The curves pass through all specified data points
2. 1st derivative continuity at interior points
3. 2nd derivative continuity at interior points
4. boundary conditions specified at the free ends