{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:UACWTQKMV7ZSIAA4ZLUUWF7UBG","short_pith_number":"pith:UACWTQKM","canonical_record":{"source":{"id":"2302.03738","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-02-07T20:33:01Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"fd14b7461987ffa734a33637f32d49187d94831bfc8dca14bb4e3d2bc28ac4d3","abstract_canon_sha256":"2b332ed71e2d58742c565f184144658659745cf164c632debe3ff566a71a2cdf"},"schema_version":"1.0"},"canonical_sha256":"a00569c14caff324001ccae94b17f409bd81bccd97710b83051d4784cda28c0b","source":{"kind":"arxiv","id":"2302.03738","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.03738","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"arxiv_version","alias_value":"2302.03738v2","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.03738","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_12","alias_value":"UACWTQKMV7ZS","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_16","alias_value":"UACWTQKMV7ZSIAA4","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_8","alias_value":"UACWTQKM","created_at":"2026-07-05T07:15:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:UACWTQKMV7ZSIAA4ZLUUWF7UBG","target":"record","payload":{"canonical_record":{"source":{"id":"2302.03738","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-02-07T20:33:01Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"fd14b7461987ffa734a33637f32d49187d94831bfc8dca14bb4e3d2bc28ac4d3","abstract_canon_sha256":"2b332ed71e2d58742c565f184144658659745cf164c632debe3ff566a71a2cdf"},"schema_version":"1.0"},"canonical_sha256":"a00569c14caff324001ccae94b17f409bd81bccd97710b83051d4784cda28c0b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:15:13.130404Z","signature_b64":"f16e7zowa7TyOIXrjbhmzDxtf+32iqCNKstYlZUoUgB6eWBonyJxTJNKxoeb62fzdsYArtV4YBghy0JRp/6WAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a00569c14caff324001ccae94b17f409bd81bccd97710b83051d4784cda28c0b","last_reissued_at":"2026-07-05T07:15:13.129963Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:15:13.129963Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.03738","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:15:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vTtUxHEzJXdR0guH75K52LxQwrH5e0p1XKZfdWWJPEsCRxZmFcSs5phOdt3JvdZ9ZRAddCtZb+pFC7XxnDefCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:55:51.008352Z"},"content_sha256":"670e03a7ccb5c2e4fbe038d3f852d275533eee5b1d0afd83c5ae3dbb659fc5a7","schema_version":"1.0","event_id":"sha256:670e03a7ccb5c2e4fbe038d3f852d275533eee5b1d0afd83c5ae3dbb659fc5a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:UACWTQKMV7ZSIAA4ZLUUWF7UBG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Vorticity cascade and turbulent drag in wall-bounded flows: plane Poiseuille flow","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Charles Meneveau, Gregory Eyink, Samvit Kumar","submitted_at":"2023-02-07T20:33:01Z","abstract_excerpt":"Drag for wall-bounded flows is directly related to flux of spanwise vorticity outward from the wall. In turbulent flows a key contribution arises from cross-stream \"vorticity cascade\" by nonlinear advection and stretching of vorticity. We study this process using numerical simulation data of turbulent channel flow at $Re_\\tau=1000$. The net transfer from the wall of fresh spanwise vorticity created by downstream pressure drop is due to two large opposing fluxes, one which is \"down-gradient\" or outward from the wall, where most vorticity concentrates, and the other which is \"up-gradient\" or tow"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.03738","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/2302.03738/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:15:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VCNbyGV1gu6L1yH+8+3KMAhUfdfp+Ak756W6hd07DqIVZhzlbXVkESIwxdt5IU13Qlha8aLFuHUv/ercY+KqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:55:51.008936Z"},"content_sha256":"39365453c2c54dece8dd2b0f7bc4a39d63e9d9f44d84a91054cb1f8b1c743d15","schema_version":"1.0","event_id":"sha256:39365453c2c54dece8dd2b0f7bc4a39d63e9d9f44d84a91054cb1f8b1c743d15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/bundle.json","state_url":"https://pith.science/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T17:55:51Z","links":{"resolver":"https://pith.science/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG","bundle":"https://pith.science/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/bundle.json","state":"https://pith.science/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UACWTQKMV7ZSIAA4ZLUUWF7UBG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:UACWTQKMV7ZSIAA4ZLUUWF7UBG","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":"2b332ed71e2d58742c565f184144658659745cf164c632debe3ff566a71a2cdf","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-02-07T20:33:01Z","title_canon_sha256":"fd14b7461987ffa734a33637f32d49187d94831bfc8dca14bb4e3d2bc28ac4d3"},"schema_version":"1.0","source":{"id":"2302.03738","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.03738","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"arxiv_version","alias_value":"2302.03738v2","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.03738","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_12","alias_value":"UACWTQKMV7ZS","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_16","alias_value":"UACWTQKMV7ZSIAA4","created_at":"2026-07-05T07:15:13Z"},{"alias_kind":"pith_short_8","alias_value":"UACWTQKM","created_at":"2026-07-05T07:15:13Z"}],"graph_snapshots":[{"event_id":"sha256:39365453c2c54dece8dd2b0f7bc4a39d63e9d9f44d84a91054cb1f8b1c743d15","target":"graph","created_at":"2026-07-05T07:15:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2302.03738/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Drag for wall-bounded flows is directly related to flux of spanwise vorticity outward from the wall. In turbulent flows a key contribution arises from cross-stream \"vorticity cascade\" by nonlinear advection and stretching of vorticity. We study this process using numerical simulation data of turbulent channel flow at $Re_\\tau=1000$. The net transfer from the wall of fresh spanwise vorticity created by downstream pressure drop is due to two large opposing fluxes, one which is \"down-gradient\" or outward from the wall, where most vorticity concentrates, and the other which is \"up-gradient\" or tow","authors_text":"Charles Meneveau, Gregory Eyink, Samvit Kumar","cross_cats":["physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-02-07T20:33:01Z","title":"Vorticity cascade and turbulent drag in wall-bounded flows: plane Poiseuille flow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.03738","kind":"arxiv","version":2},"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":"sha256:670e03a7ccb5c2e4fbe038d3f852d275533eee5b1d0afd83c5ae3dbb659fc5a7","target":"record","created_at":"2026-07-05T07:15:13Z","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":"2b332ed71e2d58742c565f184144658659745cf164c632debe3ff566a71a2cdf","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2023-02-07T20:33:01Z","title_canon_sha256":"fd14b7461987ffa734a33637f32d49187d94831bfc8dca14bb4e3d2bc28ac4d3"},"schema_version":"1.0","source":{"id":"2302.03738","kind":"arxiv","version":2}},"canonical_sha256":"a00569c14caff324001ccae94b17f409bd81bccd97710b83051d4784cda28c0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a00569c14caff324001ccae94b17f409bd81bccd97710b83051d4784cda28c0b","first_computed_at":"2026-07-05T07:15:13.129963Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:15:13.129963Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f16e7zowa7TyOIXrjbhmzDxtf+32iqCNKstYlZUoUgB6eWBonyJxTJNKxoeb62fzdsYArtV4YBghy0JRp/6WAA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:15:13.130404Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.03738","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:670e03a7ccb5c2e4fbe038d3f852d275533eee5b1d0afd83c5ae3dbb659fc5a7","sha256:39365453c2c54dece8dd2b0f7bc4a39d63e9d9f44d84a91054cb1f8b1c743d15"],"state_sha256":"ca673cd3dc79c7fc649f5a5bea6cd2c796e4081ebd9364f5bb2432dfac872fdb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mxUuyJMDSJCErDQHxQ29jcLtq4CJ2y603Y8OgzbeIuC8Ui/r5/eXFn82R2jKz4zVjfeEqfnxBNV853Zk8EexDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:55:51.013925Z","bundle_sha256":"a1ea05018d182b33ee08da35696a66baa9b20d25765343f447e24ccb6365016f"}}