{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:TW6ZP4PCQWDDRSQKPGTADEGCC5","short_pith_number":"pith:TW6ZP4PC","schema_version":"1.0","canonical_sha256":"9dbd97f1e2858638ca0a79a60190c21769e8d3e1d26a304f923c3ddb5d2ecf3a","source":{"kind":"arxiv","id":"2603.19015","version":2},"attestation_state":"computed","paper":{"title":"Enhanced stability of pressure relief valves: mechanistic design and analysis","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"math.DS","authors_text":"Alan R. Champneys, Csaba J. H\\H{o}s, Hong Tang, Istvan Erdodi","submitted_at":"2026-03-19T15:19:59Z","abstract_excerpt":"Pressure-relief valves, often the critical last line of defence in process engineering, are known to be susceptible to valve chatter. Such behaviour has been shown to arise from a flutter instability, or Hopf bifurcation, associated with the fundamental, quarter-wave acoustic mode of their inlet piping. Here, a novel design concept is proposed and analyzed for eliminating this instability. The concept involves using an oversized valve with reduced lift and adopting a discharge characteristic that enhances the blow-down effect, so that the valve opens immediately to its upper lift limit upon re"},"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":"2603.19015","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"math.DS","submitted_at":"2026-03-19T15:19:59Z","cross_cats_sorted":[],"title_canon_sha256":"979d66cb9eb0703d1c0a35748ac9c03bd0a8244dd130edabd4d66bd67af47901","abstract_canon_sha256":"a313b2fae4d2aaf4b55e0f3f1781bdb5648075b68cb0bb0329ab3eeaad651566"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:12:53.287823Z","signature_b64":"g8Do+fOoQacv2aQJnQNR5WgorHxVihGK91rJqdb6hwIYxadHQOvRMgq/g+2S1dj7EraH1qXASXp9+2kQOT/iDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9dbd97f1e2858638ca0a79a60190c21769e8d3e1d26a304f923c3ddb5d2ecf3a","last_reissued_at":"2026-06-19T16:12:53.287275Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:12:53.287275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Enhanced stability of pressure relief valves: mechanistic design and analysis","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"math.DS","authors_text":"Alan R. Champneys, Csaba J. H\\H{o}s, Hong Tang, Istvan Erdodi","submitted_at":"2026-03-19T15:19:59Z","abstract_excerpt":"Pressure-relief valves, often the critical last line of defence in process engineering, are known to be susceptible to valve chatter. Such behaviour has been shown to arise from a flutter instability, or Hopf bifurcation, associated with the fundamental, quarter-wave acoustic mode of their inlet piping. Here, a novel design concept is proposed and analyzed for eliminating this instability. The concept involves using an oversized valve with reduced lift and adopting a discharge characteristic that enhances the blow-down effect, so that the valve opens immediately to its upper lift limit upon re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.19015","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.19015/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2603.19015","created_at":"2026-06-19T16:12:53.287341+00:00"},{"alias_kind":"arxiv_version","alias_value":"2603.19015v2","created_at":"2026-06-19T16:12:53.287341+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.19015","created_at":"2026-06-19T16:12:53.287341+00:00"},{"alias_kind":"pith_short_12","alias_value":"TW6ZP4PCQWDD","created_at":"2026-06-19T16:12:53.287341+00:00"},{"alias_kind":"pith_short_16","alias_value":"TW6ZP4PCQWDDRSQK","created_at":"2026-06-19T16:12:53.287341+00:00"},{"alias_kind":"pith_short_8","alias_value":"TW6ZP4PC","created_at":"2026-06-19T16:12:53.287341+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/TW6ZP4PCQWDDRSQKPGTADEGCC5","json":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5.json","graph_json":"https://pith.science/api/pith-number/TW6ZP4PCQWDDRSQKPGTADEGCC5/graph.json","events_json":"https://pith.science/api/pith-number/TW6ZP4PCQWDDRSQKPGTADEGCC5/events.json","paper":"https://pith.science/paper/TW6ZP4PC"},"agent_actions":{"view_html":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5","download_json":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5.json","view_paper":"https://pith.science/paper/TW6ZP4PC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2603.19015&json=true","fetch_graph":"https://pith.science/api/pith-number/TW6ZP4PCQWDDRSQKPGTADEGCC5/graph.json","fetch_events":"https://pith.science/api/pith-number/TW6ZP4PCQWDDRSQKPGTADEGCC5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5/action/storage_attestation","attest_author":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5/action/author_attestation","sign_citation":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5/action/citation_signature","submit_replication":"https://pith.science/pith/TW6ZP4PCQWDDRSQKPGTADEGCC5/action/replication_record"}},"created_at":"2026-06-19T16:12:53.287341+00:00","updated_at":"2026-06-19T16:12:53.287341+00:00"}