**4. Conclusions**

In this paper, a trans-scale discretization method for analyzing the formation of reactive material shaped charge jet is proposed. Additionally, an X-ray experiment is conducted to confirm the validity of the trans-scale numerical simulations. Formation process of PTFE/Al reactive material jet, Al granule size difference induced particle dispersion, and granule distribution induced jet particle distribution are obtained and discussed. The main conclusions are as follows:


**Author Contributions:** G.L., conceptualization, investigation, writing—original draft, writing— review and editing; C.G., conceptualization, writing—original draft; Z.L., resources, conceptualization; L.T., investigation; H.W., conceptualization, writing—review and editing. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research is supported by the Natural Science Foundation of Beijing, China (No. 1214022).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
