# 1D Heat Transfer (Bar) — Welcome to LS-DYNA Examples

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A bar is subjected at one end to a varying temperature and at the other end to a constant temperature. Example 22 from Introductory Manual for LS-DYNA Users by James M. Kennedy.

## Keywords

```*BOUNDARY_TEMPERATURE_SET
*CONTROL_SOLUTION
*CONTROL_TERMINATION
*CONTROL_THERMAL_SOLVER
*CONTROL_THERMAL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DATABASE_HISTORY_NODE
*DATABASE_TPRINT
*DEFINE_CURVE
*ELEMENT_SOLID
*END
*INITIAL_TEMPERATURE_SET
*KEYWORD
*MAT_THERMAL_ISOTROPIC
*NODE
*PART
*SECTION_SOLID
*SET_NODE_LIST_TITLE
*TITLE```

## Reduced Input

```*KEYWORD
*TITLE
1D Transient Heat Transfer in a Bar
*CONTROL_SOLUTION
1         0         0         0
*CONTROL_THERMAL_SOLVER
1         0         3  1.00e-06         8  1.000000  1.000000       0.0
*CONTROL_THERMAL_TIMESTEP
1  0.500000 1.000e-04 1.000e-04  0.100000  1.000000  0.500000
*CONTROL_TERMINATION
32.00000         0       0.0       0.0       0.0
*DATABASE_TPRINT
1.000000         0         0         1
*DATABASE_HISTORY_NODE
5         6        11        12        17        18        23        24
29        30        35        36        41        42        47        48
53        54
*DATABASE_BINARY_D3PLOT
1.000000         0         0         0         0
*PART
1         1         0         0         0         0         0         1
*SECTION_SOLID
1         2         1
*MAT_THERMAL_ISOTROPIC
1  7200.000       0.0       0.0
440.5000   35.0000
*BOUNDARY_TEMPERATURE_SET
1         0       0.0         0
*BOUNDARY_TEMPERATURE_SET
2         1  1.000000         0
*INITIAL_TEMPERATURE_SET
3       0.0         0
*SET_NODE_LIST_TITLE
A
1       0.0       0.0       0.0       0.0
1         7        13        19        25        31        37        43
49
*SET_NODE_LIST_TITLE
B
2       0.0       0.0       0.0       0.0
6        12        18        24        30        36        42        48
54
*SET_NODE_LIST_TITLE
central
3       0.0       0.0       0.0       0.0
1         2         3         4         5         6         7         8
9        10        11        12        13        14        15        16
17        18        19        20        21        22        23        24
25        26        27        28        29        30        31        32
33        34        35        36        37        38        39        40
41        42        43        44        45        46        47        48
49        50        51        52        53        54
*DEFINE_CURVE
1         0       0.0       0.0       0.0       0.0
0.0                 0.0
1.00000000          7.84194040
2.00000000         15.63558102
3.00000000         23.33292198
4.00000000         30.88655281
5.00000000         38.24995041
6.00000000         45.37776184
7.00000000         52.22608948
8.00000000         58.75275421
9.00000000         64.91754913
10.00000000         70.68251801
11.00000000         76.01214600
12.00000000         80.87360382
13.00000000         85.23696136
14.00000000         89.07533264
15.00000000         92.36508179
16.00000000         95.08594513
17.00000000         97.22116852
18.00000000         98.75759888
19.00000000         99.68576813
20.00000000         99.99996948
21.00000000         99.69825745
22.00000000         98.78250122
23.00000000         97.25833130
24.00000000         95.13513947
25.00000000         92.42600250
26.00000000         89.14760590
27.00000000         85.32013702
28.00000000         80.96717834
29.00000000         76.11553955
30.00000000         70.79508972
31.00000000         65.03861237
32.00000000         58.88155746
*ELEMENT_SOLID
*NODE
*END
```