{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:7LJBZWHFZWB4URBTIWZNTHM6CU","short_pith_number":"pith:7LJBZWHF","canonical_record":{"source":{"id":"1904.06381","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-04-12T19:13:58Z","cross_cats_sorted":[],"title_canon_sha256":"cde76215c4db7bf6e3f1149f3dfbd8e960f52889327d15c0e10d7e95a5af92ae","abstract_canon_sha256":"e8eaf816200d9e374a714365d2de2cd2d721d24f665ba3c333c4d2d786e78d9b"},"schema_version":"1.0"},"canonical_sha256":"fad21cd8e5cd83ca443345b2d99d9e15257b0fd3b435ad42275b738ea0f03771","source":{"kind":"arxiv","id":"1904.06381","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06381","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06381v1","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06381","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"pith_short_12","alias_value":"7LJBZWHFZWB4","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7LJBZWHFZWB4URBT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7LJBZWHF","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:7LJBZWHFZWB4URBTIWZNTHM6CU","target":"record","payload":{"canonical_record":{"source":{"id":"1904.06381","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-04-12T19:13:58Z","cross_cats_sorted":[],"title_canon_sha256":"cde76215c4db7bf6e3f1149f3dfbd8e960f52889327d15c0e10d7e95a5af92ae","abstract_canon_sha256":"e8eaf816200d9e374a714365d2de2cd2d721d24f665ba3c333c4d2d786e78d9b"},"schema_version":"1.0"},"canonical_sha256":"fad21cd8e5cd83ca443345b2d99d9e15257b0fd3b435ad42275b738ea0f03771","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:41.488562Z","signature_b64":"jL3Rmz0sSuP/Iccsdvjs7VjBkXPc2MtOr+I1quHRCCjk2kFk7v6TlKiA7JqnRaNa0AvfrY7na1OJ7ZBmkNRtDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fad21cd8e5cd83ca443345b2d99d9e15257b0fd3b435ad42275b738ea0f03771","last_reissued_at":"2026-05-17T23:48:41.488103Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:41.488103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.06381","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kclbv6G7eobJThfBHXIv9vYaaHue1HWmixqHGdrtr7Dp/BGt/b+RgAEN3erBcAO4QHqP2Hbt6b59VQrYgqHJDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:37:01.674341Z"},"content_sha256":"43cce0a2ebb3491d38162be8ab0e9e7db0f89602f8a05a64ce02e05be7ac6d75","schema_version":"1.0","event_id":"sha256:43cce0a2ebb3491d38162be8ab0e9e7db0f89602f8a05a64ce02e05be7ac6d75"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:7LJBZWHFZWB4URBTIWZNTHM6CU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Velocity and spatial distribution of inertial particles in a turbulent channel flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Filippo Coletti, Kee Onn Fong, Omid Amili","submitted_at":"2019-04-12T19:13:58Z","abstract_excerpt":"We present experimental observations of the velocity and spatial distribution of inertial particles dispersed in the turbulent downward flow through a vertical channel at $Re_{\\tau} = 235$ and $335$. The working fluid is air laden with size-selected glass micro-spheres, with Stokes numbers $St = O(10)$ and $O(100)$ based on the Kolmogorov and viscous time scales, respectively. Cases at solid volume fractions ${\\phi}_v = 3{\\times}10^{-6}$ and $5{\\times}10^{-5}$ are considered. In the more dilute regime, the particle concentration profile shows near-wall and centerline maxima compatible with a t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06381","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vvhAtHIZK2szFD3OEF+pve180P89/9zlgPdgHjhn3bJ99fzmM1W7+0OqI7tRcpSyHelpTT+sMwpdIBostZuWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:37:01.674684Z"},"content_sha256":"6efacf5a73540ae24368f211cefea85bda3f26a8ae698e1a99c0c03675c290a6","schema_version":"1.0","event_id":"sha256:6efacf5a73540ae24368f211cefea85bda3f26a8ae698e1a99c0c03675c290a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/bundle.json","state_url":"https://pith.science/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/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":"2026-06-03T02:37:01Z","links":{"resolver":"https://pith.science/pith/7LJBZWHFZWB4URBTIWZNTHM6CU","bundle":"https://pith.science/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/bundle.json","state":"https://pith.science/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7LJBZWHFZWB4URBTIWZNTHM6CU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7LJBZWHFZWB4URBTIWZNTHM6CU","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":"e8eaf816200d9e374a714365d2de2cd2d721d24f665ba3c333c4d2d786e78d9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-04-12T19:13:58Z","title_canon_sha256":"cde76215c4db7bf6e3f1149f3dfbd8e960f52889327d15c0e10d7e95a5af92ae"},"schema_version":"1.0","source":{"id":"1904.06381","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06381","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06381v1","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06381","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"pith_short_12","alias_value":"7LJBZWHFZWB4","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7LJBZWHFZWB4URBT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7LJBZWHF","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:6efacf5a73540ae24368f211cefea85bda3f26a8ae698e1a99c0c03675c290a6","target":"graph","created_at":"2026-05-17T23:48:41Z","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":"We present experimental observations of the velocity and spatial distribution of inertial particles dispersed in the turbulent downward flow through a vertical channel at $Re_{\\tau} = 235$ and $335$. The working fluid is air laden with size-selected glass micro-spheres, with Stokes numbers $St = O(10)$ and $O(100)$ based on the Kolmogorov and viscous time scales, respectively. Cases at solid volume fractions ${\\phi}_v = 3{\\times}10^{-6}$ and $5{\\times}10^{-5}$ are considered. In the more dilute regime, the particle concentration profile shows near-wall and centerline maxima compatible with a t","authors_text":"Filippo Coletti, Kee Onn Fong, Omid Amili","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-04-12T19:13:58Z","title":"Velocity and spatial distribution of inertial particles in a turbulent channel flow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06381","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":"sha256:43cce0a2ebb3491d38162be8ab0e9e7db0f89602f8a05a64ce02e05be7ac6d75","target":"record","created_at":"2026-05-17T23:48:41Z","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":"e8eaf816200d9e374a714365d2de2cd2d721d24f665ba3c333c4d2d786e78d9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-04-12T19:13:58Z","title_canon_sha256":"cde76215c4db7bf6e3f1149f3dfbd8e960f52889327d15c0e10d7e95a5af92ae"},"schema_version":"1.0","source":{"id":"1904.06381","kind":"arxiv","version":1}},"canonical_sha256":"fad21cd8e5cd83ca443345b2d99d9e15257b0fd3b435ad42275b738ea0f03771","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fad21cd8e5cd83ca443345b2d99d9e15257b0fd3b435ad42275b738ea0f03771","first_computed_at":"2026-05-17T23:48:41.488103Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:41.488103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jL3Rmz0sSuP/Iccsdvjs7VjBkXPc2MtOr+I1quHRCCjk2kFk7v6TlKiA7JqnRaNa0AvfrY7na1OJ7ZBmkNRtDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:41.488562Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.06381","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43cce0a2ebb3491d38162be8ab0e9e7db0f89602f8a05a64ce02e05be7ac6d75","sha256:6efacf5a73540ae24368f211cefea85bda3f26a8ae698e1a99c0c03675c290a6"],"state_sha256":"53fdb6e9589e3f79fa3432725cb36ed0884da3e3b6b1eeb0049f90f97f3be274"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Jl80kz457y/TGRJAIhvFG+sBejFU/TNdwmA8S50gFXASZWpIuwaNAZMyTePj+ib/ltlqglmw7XKYDCXkSTrDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T02:37:01.676646Z","bundle_sha256":"1d2cba37acf9da9f98f49c02cffc3cc474895de7bb06c9a2adacbfc4c1c98be3"}}