{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5TKXG5A65LWVPCUWQTS4M2HW22","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"14e0e52a0cdf88c192c87a60b36d7e152d54ad0935ff7ff3950589eb61a64ffa","cross_cats_sorted":["math.AP","math.NA","physics.comp-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2015-08-31T23:28:07Z","title_canon_sha256":"2f9ff917392053199cad6f1554494e08fb343be6e779271c4517d15140e04bc9"},"schema_version":"1.0","source":{"id":"1509.00093","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00093","created_at":"2026-05-18T01:20:26Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00093v1","created_at":"2026-05-18T01:20:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00093","created_at":"2026-05-18T01:20:26Z"},{"alias_kind":"pith_short_12","alias_value":"5TKXG5A65LWV","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"5TKXG5A65LWVPCUW","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"5TKXG5A6","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:e10ff7b484e18e787deaf6602de3ce814a8fde7f54bbde8dd44adf031f7affec","target":"graph","created_at":"2026-05-18T01:20:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"A new fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas-particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and solid particles, we adopt an asymptotic expansion strategy to derive a compressible version of the first-order non-equilibrium model, valid for low concentration regimes and small particles Stokes $St<0.2$. When $St < 0.001$ the model reduces to the dusty-gas one. The new model is significantly faster than the Eulerian model while retaining th","authors_text":"Luigi Carlo Berselli, Matteo Cerminara, Tomaso Esposti Ongaro","cross_cats":["math.AP","math.NA","physics.comp-ph","physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2015-08-31T23:28:07Z","title":"ASHEE: a compressible, equilibrium-Eulerian model for volcanic ash plumes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00093","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:894c3a4a9f32a4ce0bd1da52b911ba467e85483fc95b46eb8945230bab8d77bd","target":"record","created_at":"2026-05-18T01:20:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"14e0e52a0cdf88c192c87a60b36d7e152d54ad0935ff7ff3950589eb61a64ffa","cross_cats_sorted":["math.AP","math.NA","physics.comp-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2015-08-31T23:28:07Z","title_canon_sha256":"2f9ff917392053199cad6f1554494e08fb343be6e779271c4517d15140e04bc9"},"schema_version":"1.0","source":{"id":"1509.00093","kind":"arxiv","version":1}},"canonical_sha256":"ecd573741eeaed578a9684e5c668f6d698a520d0c481b73ed0c399c234cf8143","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ecd573741eeaed578a9684e5c668f6d698a520d0c481b73ed0c399c234cf8143","first_computed_at":"2026-05-18T01:20:26.015233Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:26.015233Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E/NUkePIMWPLxCFTrV28au8Wavvjz5C3wyAuQIIvGIgVSUHDsAZ5hmU1JBLE5eWIkWSHCHQT3hPRkmtRh0ZGCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:26.015868Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00093","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:894c3a4a9f32a4ce0bd1da52b911ba467e85483fc95b46eb8945230bab8d77bd","sha256:e10ff7b484e18e787deaf6602de3ce814a8fde7f54bbde8dd44adf031f7affec"],"state_sha256":"2ae7ab93975337002ac2207955c2633a63f03c9ac4dcca938e44b8d27507d7cd"}