Computer Programs

NEA-0532 TAFE.

NEA-0532 TAFE.

TAFE, 2-D Steady-State Heat Conduction for Structure with Gas Gaps

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, CPU, FEATURES, AUXILIARIES, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: TAFE.

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2. COMPUTERS

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Program name	Package id	Status	Status date
TAFE	NEA-0532/01	Tested	01-DEC-1976

Machines used:

Package ID	Orig. computer	Test computer
NEA-0532/01	IBM 370 series	IBM 370 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

Two-dimensional steady-state temperature field calculation by the program allows the study of two-dimensional steady-state temperature fields (plane or axisymmetric problems) by means of the finite element method. It is intended for structures consisting of regions separated by gas filled gaps. The exchange of heat between adjacent regions takes place by conduction in the gas and/or by radiation. Each region and each filling gas may have an isotropic thermal conductivity which is temperature dependent.

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4. METHOD OF SOLUTION

Triangular finite elements with linear local field are used. The transformation of Kirchhoff is used to eliminate the non-linearity due to the dependence of the thermal conductivity on temperature. However, when heat convection is present this transformation cannot eliminate the non-linearity. In this case and when radiation is present an iterative scheme is used. The method of Choleski is used to solve the system of linear equations.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Max nr of elements 1500
max nr of nodal points 100
Each mode may have at most 8 neighbours, of which only 5 may have an index higher than the mode itself.
In order to limit the band-width the indexes of adjacent modes may be no more than 19 apart.

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6. TYPICAL RUNNING TIME

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
NEA-0532/01	01-DEC-1976	Tested at NEADB

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10. REFERENCES

- J.Donea and S.Guilia:
'Code TAFE - analyse numerique de problems thermiques en presence de rayonnement et de conductivites variables avec la temperature'
EUR 4809.F (1972).

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11. MACHINE REQUIREMENTS: 222 k-bytes, no peripherals.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0532/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: IBM 360 or 370 O.S.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

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15. NAME AND ESTABLISHMENT OF AUTHOR

     J. Donea and S. Giuliani
     Materials Division
     EURATOM, Ispra Italy

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16. MATERIAL AVAILABLE

NEA-0532/01

File name	File description	Records
NEA0532_01.001	SOURCE FORTRAN IV	1097
NEA0532_01.002	SAMPLE PROBLEM INPUT	179
NEA0532_01.003	SAMPLE PROBLEM OUTPUT	321

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17. CATEGORIES

H. Heat Transfer and Fluid Flow

Keywords: finite element method, heat transfer, steady-state conditions, temperature, thermal conduction, thermal radiation, two-dimensional.