Ityp = 2

Block Format Keyword

/MAT/LAW11 - ITYP=2: Boundary Conditions Material in Flow Analysis.

Description

This law enables to model a material inlet/outlet by directly imposing its state.

law11_ityp0

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/MAT/LAW11/mat_ID or /MAT/BOUND/mat_ID
mat_title

Ityp		Psh		FscaleT

Ityp = 2 - General Inlet/Outlet

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
Blank Format

fct_IDp		P0
fct_IDE		E0
Blank Format
Blank Format
fct_IDT	fct_IDQ

Field	Contents	SI Unit Example
mat_ID	Material identifier (Integer, maximum 10 digits)
mat_title	Material title (Character, maximum 100 characters)
	Initial density (Comment 3) (Real)
	Reference density used in E.O.S (equation of state) Default (Real)
Ityp	Boundary condition type (Comment 1) (Integer) = 0: gas inlet (from stagnation point data) = 1: liquid inlet (from stagnation point data) = 2: general inlet/outlet = 3: non-reflecting boundary
Psh	Pressure shift (Comment 2) (Real)
FscaleT	(Optional) Time scale factor (Comment 3) (Real)
fct_ID	(Optional) Function identifier for boundary density (Comment 3) (Integer) = 0: > 0:
fct_IDp	(Optional) Function identifier for boundary pressure (Comment 3) (Integer) = 0: > 0:
	Initial pressure (Comment 3) (Real)
fct_IDE	(Optional) Function identifier for boundary density (Comment 3) (Integer) = 0: > 0:
	Initial energy (Comments 3 and 6) (Real)
fct_IDT	(Optional) Function identifier for boundary temperature (Comments 3 and 4) (Integer) = 0: T = Tadjacent = n:
fct_IDQ	(Optional) Function identifier for boundary heat flux (Comments 3 and 4) (Integer) = 0: no imposed flux = n:

1.	Provided state is directly imposed to inlet boundary elements. This leads to the following inlet state:

With this formulation, you may impose velocity on boundary nodes to be consistent with physical inlet velocity (/IMPVEL). /MAT/LAW11 – ITYP=0 and 1, are based on material state from stagnation point, where you do not need to imposed an inlet velocity.

2.	The PSH parameter enables shifting the output pressure which also becomes P-PSH. If using PSH=P(t=0), the output pressure will be , with an initial value of 0.0.

If no function is defined, then related quantity

remains constant and set to its initial value. However, all input quantities

can be defined as time dependent function using provided function identifiers. Abscissa functions can also be scaled using FscaleT parameter which leads to use f (Fscalet * t) instead of f(t).

4.	With thermal modeling, all thermal data (, …) can be defined with /HEAT.

5.	It is not possible to use this boundary material law with multi-material ALE laws 37 (BIMAT) and 51 (MULTIMAT).

6.	Specific volume energy E is defined as E = Eint / V, where Eint is the internal energy. It can be output using /TH/BRIC.

Specific mass energy e is defined as e = Eint / m. This leads to . Specific mass energy e can be output using /ANIM/ELEM/ENER. This may be a relative energy depending on user modeling.