Index

Fi(...)

Ver: 0
 

DESCRIPTION

Material parameters or boundary condition parameters can be defined as a function of fields.

The user can define this field dependence as a function of functions :
F = F( f1(X1,X2), f2(X1,X2), f3(X1,X2), ....)
where X1,X2 are two fields of the global system (temperature, pressure, coordinates, a species, ...)

The current menu allows for the definition of each function fi.

  OPTIONS
 
1 f = a
Constant function
2 f(X1) = a+b*X1+c*X1**2+d*X1**3
One-field function. Third order polynomial.
3 f(X1) = Heaviside's unit function
One-field function. f = 1 if X1 ? a and f = 0 otherwise
4 f(X1) = 1 - Heaviside's unit function
One-field function. f = 1 if X1 ? a and f = 0 otherwise
5 f(X1) = Range function
One-field function. f = 1 if a ‹ X1 ‹ b and f = 0 otherwise
6 f(X1) = a*exp(b/(X1+c))
One-field function. Exponential form (e-base).
7 Multi-ramp function
Multi-linear function defined by a series of (X1,function value) pairs
8 f(X1,X2) = a*(X1**b)*(X2**c)
Two-fields function. Rational exponents.
9 f(X1,X2) = X1*(a+b*X2+c*X2**2+d*X2**3)
Two-fields function. Fields-average.
10 f(X1,X2) = Arefmanesh function
Two-fields function. This function corresponds to a foaming model where X1 is the pressure and X2 the Bubble Radius.
30+i Change field Xi = X-coordinate
Allows for the choice of Xi
60+i Modify parameter a = 1.0000000E+00
Sets the ith parameter of the function fi(X1,X2)
SEE ALSO