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/MAT/LAW18 (THERM)

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/MAT/LAW18 (THERM)
/MAT/LAW18 (THERM)

Block Format Keyword

/MAT/LAW18 - Purely Thermal Material

Description

This law describes thermal material.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/MAT/LAW18/mat_ID or /MAT/THERM/mat_ID
mat_title

		A		B
fct_IDT	T0		FscaleT
fct_IDsph	fct_IDas	Fscalesph		FscaleE		FscaleK

Field	Contents	SI Unit Example
mat_ID	Material identifier (Integer, maximum 10 digits)
mat_title	Material title (Character, maximum 100 characters)
	Initial density (Real)
	Reference density used in E.O.S (equation of state) Default (Real)
	Specific heat (Real)
A	Conductivity coefficient A (Real)
B	Conductivity coefficient B (Real)
fct_IDT	Function identifier for T (Comment 9) (Integer) = 0: T is computed = n:
T0	Initial temperature Default = 300K (Real)
FscaleT	Time scale factor (Real)
fct_IDsph	Function g(T, E) identifier for temperature vs energy (Comment 7) (Integer)
fct_IDas	Function h(k, T) identifier for conductivity vs temperature (Integer)
Fscalesph	Temperature scale factor (Real)
FscaleE	Energy scale factor (Real)
FscaleK	Conductivity scale factor (Real)

1.	This material can be used:

•	as purely thermal material (only Line 4 is read)

•	as boundaries conditions (temperature or flux) (use Line 5)

2.	The k (thermal conductivity) is computed as:

k = A + BT

3.	The (thermal diffusivity) is computed as:

Cp heat capacity at constant pressure.

4.	The k (thermal conductivity) is given by curve fct_IDas.

5.	The (thermal diffusivity) is computed with curve fct_IDsph

with, .

6.	Function g(T, E) is similar as following curve:

7.	If fct_IDsph ≠ 0,

;

8.	If fct_IDsph = 0,

with Sph = 0Cp

9.	If fct_IDT ≠ 0,

with Time = Time * FscaleT;

10.	If fct_IDas ≠ 0,

; A = fct_IDas (T)FscaleE ; B = 0

See Also:

Material Compatibility