{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:QTPXZ7LRXZZB4G2HJKZ3UTD27H","short_pith_number":"pith:QTPXZ7LR","schema_version":"1.0","canonical_sha256":"84df7cfd71be721e1b474ab3ba4c7af9e5c5864df6418165b2a202a70ce8a827","source":{"kind":"arxiv","id":"1712.02221","version":2},"attestation_state":"computed","paper":{"title":"Air cavities at the inner cylinder of turbulent Taylor-Couette flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Chao Sun, Dennis Bakhuis, Detlef Lohse, Pim A. Bullee, Ruben A. Verschoof, Sander G. Huisman","submitted_at":"2017-12-06T15:07:20Z","abstract_excerpt":"Air cavities, i.e. air layers developed behind cavitators, are seen as a promising drag reducing method in the maritime industry. Here we utilize the Taylor-Couette (TC) geometry, i.e. the flow between two concentric, independently rotating cylinders, to study the effect of air cavities in this closed setup, which is well-accessible for drag measurements and optical flow visualizations. We show that stable air cavities can be formed, and that the cavity size increases with Reynolds number and void fraction. The streamwise cavity length strongly depends on the axial position due to buoyancy for"},"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":"1712.02221","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-12-06T15:07:20Z","cross_cats_sorted":[],"title_canon_sha256":"c5db3020fe979723ba7796a6febd56a611ebd431ce2014578f49743d873088b7","abstract_canon_sha256":"32b7bc93e627025e55bfa83f84b7a9a517af6e2be6e1df47d3accfa9671f86f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:08.213754Z","signature_b64":"JodEQBVZ73eJIfhGbSHLJZK6QUsdxnR8Zpz36zvG7/fVswjI6Q1CG6KEFexuX4ckVdmoCRcvhMMl1ERPl2flCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84df7cfd71be721e1b474ab3ba4c7af9e5c5864df6418165b2a202a70ce8a827","last_reissued_at":"2026-05-18T00:16:08.213191Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:08.213191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Air cavities at the inner cylinder of turbulent Taylor-Couette flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Chao Sun, Dennis Bakhuis, Detlef Lohse, Pim A. Bullee, Ruben A. Verschoof, Sander G. Huisman","submitted_at":"2017-12-06T15:07:20Z","abstract_excerpt":"Air cavities, i.e. air layers developed behind cavitators, are seen as a promising drag reducing method in the maritime industry. Here we utilize the Taylor-Couette (TC) geometry, i.e. the flow between two concentric, independently rotating cylinders, to study the effect of air cavities in this closed setup, which is well-accessible for drag measurements and optical flow visualizations. We show that stable air cavities can be formed, and that the cavity size increases with Reynolds number and void fraction. The streamwise cavity length strongly depends on the axial position due to buoyancy for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.02221","kind":"arxiv","version":2},"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":"1712.02221","created_at":"2026-05-18T00:16:08.213301+00:00"},{"alias_kind":"arxiv_version","alias_value":"1712.02221v2","created_at":"2026-05-18T00:16:08.213301+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.02221","created_at":"2026-05-18T00:16:08.213301+00:00"},{"alias_kind":"pith_short_12","alias_value":"QTPXZ7LRXZZB","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_16","alias_value":"QTPXZ7LRXZZB4G2H","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_8","alias_value":"QTPXZ7LR","created_at":"2026-05-18T12:31:39.905425+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/QTPXZ7LRXZZB4G2HJKZ3UTD27H","json":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H.json","graph_json":"https://pith.science/api/pith-number/QTPXZ7LRXZZB4G2HJKZ3UTD27H/graph.json","events_json":"https://pith.science/api/pith-number/QTPXZ7LRXZZB4G2HJKZ3UTD27H/events.json","paper":"https://pith.science/paper/QTPXZ7LR"},"agent_actions":{"view_html":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H","download_json":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H.json","view_paper":"https://pith.science/paper/QTPXZ7LR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1712.02221&json=true","fetch_graph":"https://pith.science/api/pith-number/QTPXZ7LRXZZB4G2HJKZ3UTD27H/graph.json","fetch_events":"https://pith.science/api/pith-number/QTPXZ7LRXZZB4G2HJKZ3UTD27H/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H/action/storage_attestation","attest_author":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H/action/author_attestation","sign_citation":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H/action/citation_signature","submit_replication":"https://pith.science/pith/QTPXZ7LRXZZB4G2HJKZ3UTD27H/action/replication_record"}},"created_at":"2026-05-18T00:16:08.213301+00:00","updated_at":"2026-05-18T00:16:08.213301+00:00"}