求助：更换模型导致的Error: FLUENT received fatal signal

lhgmail

"Error: FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.
Error Object: ()"
我用UDF定义气门运动，用动网格定义活塞运动，做汽油机燃烧模拟，在选用premixed combustion和composition PDF transport模型时出现上面的错误，但用其他模型则正常。为什么？还有我在预混模型中找不到定义燃料成分的选项，但看很多做预混燃烧的都提到燃料成分？