Abstract: In view of the special needs for systems of difference equations of 2-D heat conduction coupled three temperature,the block G-S algorithm and the ICCG algorithm are presented and compared.Numerical results show that the ICCG algorithm is thousands times faster than the block G-S algorithm.Furthermore,in 2-D numerical simulation of laser hohlraum target coupling,the ICCG algorithm will raise greatly computational efficiency if it can realize vectorzation operation.

Key words: 2-D heat conduction coupled three temperature, block G-S algorithm, ICCG algori