The pressure has obvious effect on the yield of the synthesis of ultrafine diamond by explosive detonation

but it is to hard to accurate observing and measuring it in the experiment process. The process of expansion of the detonation products is simulated using finite element code in this paper. The pressure of detonation at different times in the expansion process are obtained. Different charge conditions

constraint conditions

protective conditions and initiation systems are simulated. The computation results are compared with the experiment results

the results indicate that they are concordance.