{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:WLWTDRNYAEYGDD2VC657NGVQRS","short_pith_number":"pith:WLWTDRNY","schema_version":"1.0","canonical_sha256":"b2ed31c5b80130618f5517bbf69ab08c8545061542fa325a28fa7335a3934c72","source":{"kind":"arxiv","id":"1810.08787","version":1},"attestation_state":"computed","paper":{"title":"On the drag of freely falling non-spherical particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Costanza Bonadonna, Gholamhossein Bagheri","submitted_at":"2018-10-20T10:59:09Z","abstract_excerpt":"We present a new general model for the prediction of the drag coefficient of non-spherical solid particles of regular and irregular shapes falling in gas or liquid valid for sub-critical particle Reynolds numbers (i.e. $Re < 3 \\times 10^5$). Results are obtained from experimental measurements on 300 regular and irregular particles in the air and analytical solutions for ellipsoids. Depending on their size, irregular particles are accurately characterized with a 3D laser scanner or SEM micro-CT method. The experiments are carried out in settling columns with height of 0.45 to 3.60m and in a 4m-"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1810.08787","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-10-20T10:59:09Z","cross_cats_sorted":[],"title_canon_sha256":"0877385f1c9a4056576935e25b4b75f83e963a62196fbcad411950e90f34f73e","abstract_canon_sha256":"aaecc86c7394bdde0eb048ac78b2f562555e4c7f6834a7c00fcb70146517465c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:41.881143Z","signature_b64":"3ceazbmUywxfDe43GaahBdpnNAlno4cUvWD2YlfJAPMeZNt/PfVpFPrg/99dtSzuAj6/QsUQury9RJqCvfQUBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2ed31c5b80130618f5517bbf69ab08c8545061542fa325a28fa7335a3934c72","last_reissued_at":"2026-05-18T00:02:41.880627Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:41.880627Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the drag of freely falling non-spherical particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Costanza Bonadonna, Gholamhossein Bagheri","submitted_at":"2018-10-20T10:59:09Z","abstract_excerpt":"We present a new general model for the prediction of the drag coefficient of non-spherical solid particles of regular and irregular shapes falling in gas or liquid valid for sub-critical particle Reynolds numbers (i.e. $Re < 3 \\times 10^5$). Results are obtained from experimental measurements on 300 regular and irregular particles in the air and analytical solutions for ellipsoids. Depending on their size, irregular particles are accurately characterized with a 3D laser scanner or SEM micro-CT method. The experiments are carried out in settling columns with height of 0.45 to 3.60m and in a 4m-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08787","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1810.08787","created_at":"2026-05-18T00:02:41.880711+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.08787v1","created_at":"2026-05-18T00:02:41.880711+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.08787","created_at":"2026-05-18T00:02:41.880711+00:00"},{"alias_kind":"pith_short_12","alias_value":"WLWTDRNYAEYG","created_at":"2026-05-18T12:33:01.666342+00:00"},{"alias_kind":"pith_short_16","alias_value":"WLWTDRNYAEYGDD2V","created_at":"2026-05-18T12:33:01.666342+00:00"},{"alias_kind":"pith_short_8","alias_value":"WLWTDRNY","created_at":"2026-05-18T12:33:01.666342+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS","json":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS.json","graph_json":"https://pith.science/api/pith-number/WLWTDRNYAEYGDD2VC657NGVQRS/graph.json","events_json":"https://pith.science/api/pith-number/WLWTDRNYAEYGDD2VC657NGVQRS/events.json","paper":"https://pith.science/paper/WLWTDRNY"},"agent_actions":{"view_html":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS","download_json":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS.json","view_paper":"https://pith.science/paper/WLWTDRNY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.08787&json=true","fetch_graph":"https://pith.science/api/pith-number/WLWTDRNYAEYGDD2VC657NGVQRS/graph.json","fetch_events":"https://pith.science/api/pith-number/WLWTDRNYAEYGDD2VC657NGVQRS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS/action/storage_attestation","attest_author":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS/action/author_attestation","sign_citation":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS/action/citation_signature","submit_replication":"https://pith.science/pith/WLWTDRNYAEYGDD2VC657NGVQRS/action/replication_record"}},"created_at":"2026-05-18T00:02:41.880711+00:00","updated_at":"2026-05-18T00:02:41.880711+00:00"}