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In both cases, process stability and resulting part quality depend on dynamic interactions between powder particles and a fluid phase, i.e., molten metal or liquid binder. The present work proposes a versatile computational modeling framework for simulating such coupled microfluid-powder dynamics problems involving thermo-capillary flow and reversible phase transitions. In particular, a liquid and a gas phase are interacting with a solid phase that consists of a substrate and mobile powder particles while simultaneously considering temperature-dependent surface tension and wetting effects. In case of laser\u2013metal interactions, the effect of rapid evaporation is incorporated through additional mechanical and thermal interface fluxes. All phase domains are spatially discretized using smoothed particle hydrodynamics. The method\u2019s Lagrangian nature is beneficial in the context of dynamically changing interface topologies due to phase transitions and coupled microfluid-powder dynamics. Special care is taken in the formulation of phase transitions, which is crucial for the robustness of the computational scheme. While the underlying model equations are of a very general nature, the proposed framework is especially suitable for the mesoscale modeling of various AM processes. To this end, the generality and robustness of the computational modeling framework is demonstrated by several application-motivated examples representing the specific AM processes binder jetting, material jetting, directed energy deposition, and powder bed fusion. Among others, it is shown how the dynamic impact of droplets in binder jetting or the evaporation-induced recoil pressure in powder bed fusion leads to powder motion, distortion of the powder packing structure, and powder particle ejection.<\/jats:p>","DOI":"10.1007\/s00366-022-01724-4","type":"journal-article","created":{"date-parts":[[2022,9,13]],"date-time":"2022-09-13T12:04:26Z","timestamp":1663070666000},"page":"4853-4877","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["A versatile SPH modeling framework for coupled microfluid-powder dynamics in additive manufacturing: binder jetting, material jetting, directed energy deposition and powder bed fusion"],"prefix":"10.1007","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0250-6876","authenticated-orcid":false,"given":"Sebastian L.","family":"Fuchs","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7109-9787","authenticated-orcid":false,"given":"Patrick M.","family":"Praegla","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8264-0885","authenticated-orcid":false,"given":"Christian J.","family":"Cyron","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7419-3384","authenticated-orcid":false,"given":"Wolfgang A.","family":"Wall","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3501-1696","authenticated-orcid":false,"given":"Christoph","family":"Meier","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,9,13]]},"reference":[{"key":"1724_CR1","doi-asserted-by":"crossref","DOI":"10.1007\/978-3-030-56127-7","volume-title":"Additive manufacturing technologies","author":"I Gibson","year":"2021","unstructured":"Gibson I, Rosen D, Strucker B, Khorasani M (2021) Additive manufacturing technologies, 3rd edn. 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