{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"f33bb078588e681dcefc14054a44185c39beefa037771bb0e046c80f9f1df33d","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"95225ede8f67c1de9e14f69280d71ea14114da05e85518bc842c38b44d8e86ec","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"fluid.drop-impact","field":"fluid","n":"1","review_cite":"C. Josserand, S. T. Thoroddsen, Drop impact on a solid surface, Annual Review of Fluid Mechanics, 2016","review_link":"https://doi.org/10.1146/annurev-fluid-122414-034401","review_verified":"true","summary":"A drop hitting a dry surface may spread smoothly or splash into a crown of droplets, and lowering the surrounding air pressure can stop the splash entirely. Related questions concern the instant a liquid neck pinches off or a bubble bursts, where the equations of motion produce singularities.","title":"Drop impact, splashing and free-surface singularities","topic_ref":null,"why":"Inkjet printing, spray coating, pesticide deposition, droplet-borne disease transmission and sea-spray aerosol production depend on these events."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"18b6d8f793345bc91659702112c5cd56d127bcc223ff71723a5520b9496d78c2","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"1b2bb0168e4f95dad212c93a2b2e75f19092783d9d7b2848b296debeb388d31b","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"mGaCweu0QSojZo0R_svDdLmPHfVBYZbTm23-1R9l65rL0fLy8kARIXw-aXdYLZIBNJsUHcEaF7uSDHJPTZzyAw"},"schema":"pubphys.envelope/1"},"record_hash":"18b6d8f793345bc91659702112c5cd56d127bcc223ff71723a5520b9496d78c2","leaf_index":215}