{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:5N4NMAVTMCGSLB6KJ77VH5AWSC","short_pith_number":"pith:5N4NMAVT","canonical_record":{"source":{"id":"2508.07644","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-08-11T05:54:16Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"2b18f70281d880149e9d1060e30e962e803b2a009740c8b8b659764aa2605d38","abstract_canon_sha256":"2145db86b16d732ae970aabbd84a6afbecd2da1732d24a07e595e4d7e2b836e2"},"schema_version":"1.0"},"canonical_sha256":"eb78d602b3608d2587ca4fff53f41690a1d7412591aa4b76f109de4ec325abfa","source":{"kind":"arxiv","id":"2508.07644","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.07644","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"arxiv_version","alias_value":"2508.07644v1","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.07644","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_12","alias_value":"5N4NMAVTMCGS","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_16","alias_value":"5N4NMAVTMCGSLB6K","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_8","alias_value":"5N4NMAVT","created_at":"2026-07-05T11:51:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:5N4NMAVTMCGSLB6KJ77VH5AWSC","target":"record","payload":{"canonical_record":{"source":{"id":"2508.07644","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-08-11T05:54:16Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"2b18f70281d880149e9d1060e30e962e803b2a009740c8b8b659764aa2605d38","abstract_canon_sha256":"2145db86b16d732ae970aabbd84a6afbecd2da1732d24a07e595e4d7e2b836e2"},"schema_version":"1.0"},"canonical_sha256":"eb78d602b3608d2587ca4fff53f41690a1d7412591aa4b76f109de4ec325abfa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:51:49.709324Z","signature_b64":"BJNxdyYXLRXjPQ7p0o2/oBzsz4Pbtnft3ykrUgTudqh+MfdnW4+3flo6FCpW2g413f0QVuJjwQHp4opWT5juCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb78d602b3608d2587ca4fff53f41690a1d7412591aa4b76f109de4ec325abfa","last_reissued_at":"2026-07-05T11:51:49.708767Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:51:49.708767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2508.07644","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":"2026-07-05T11:51:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MMaXI3vItHN0FUlQbsv1SmajK8iPMNb++cseCAs4q8oH7jdeImEm0smrvf0gy058RwTHMAZnntjI137sdmTcDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:08:18.338837Z"},"content_sha256":"0bd0e903f9047a2dc4d4de01c4aeef7fe370b0fe1262b1420329f7aa9c725f11","schema_version":"1.0","event_id":"sha256:0bd0e903f9047a2dc4d4de01c4aeef7fe370b0fe1262b1420329f7aa9c725f11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:5N4NMAVTMCGSLB6KJ77VH5AWSC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An implicit gas-kinetic scheme for internal and external flows","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Kun Xu, Xing Ji, Yue Zhang","submitted_at":"2025-08-11T05:54:16Z","abstract_excerpt":"The gas-kinetic scheme(GKS) is a promising computational fluid dynamics (CFD) method for solving the Navier-Stokes equations. It is based on the analytical solution of the BGK equation, which enables accurate and robust simulations. While GKS has demonstrated excellent properties (e.g., unified treatment of inviscid and viscous fluxes, inherent adaptive dissipation control), its application to classical engineering problems, such as aerodynamic flows and fluid machinery, remains underdeveloped compared to conventional CFD methods. This study bridges this gap by advancing GKS capabilities for r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.07644","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2508.07644/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":"2026-07-05T11:51:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9+x8cT5FqEA52zlx8YyVaAaJLdHGkoiLLyhXVIF4EJww0YVO24GSLL/bgByVIPZJu6jFRB4ho7/WG+zvah5xAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:08:18.339133Z"},"content_sha256":"71ee67859410b296d276c79a290c98a9d39011425678d73f86cdf2d8ad91292f","schema_version":"1.0","event_id":"sha256:71ee67859410b296d276c79a290c98a9d39011425678d73f86cdf2d8ad91292f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/bundle.json","state_url":"https://pith.science/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/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":"2026-07-31T17:08:18Z","links":{"resolver":"https://pith.science/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC","bundle":"https://pith.science/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/bundle.json","state":"https://pith.science/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5N4NMAVTMCGSLB6KJ77VH5AWSC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:5N4NMAVTMCGSLB6KJ77VH5AWSC","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":"2145db86b16d732ae970aabbd84a6afbecd2da1732d24a07e595e4d7e2b836e2","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-08-11T05:54:16Z","title_canon_sha256":"2b18f70281d880149e9d1060e30e962e803b2a009740c8b8b659764aa2605d38"},"schema_version":"1.0","source":{"id":"2508.07644","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.07644","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"arxiv_version","alias_value":"2508.07644v1","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.07644","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_12","alias_value":"5N4NMAVTMCGS","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_16","alias_value":"5N4NMAVTMCGSLB6K","created_at":"2026-07-05T11:51:49Z"},{"alias_kind":"pith_short_8","alias_value":"5N4NMAVT","created_at":"2026-07-05T11:51:49Z"}],"graph_snapshots":[{"event_id":"sha256:71ee67859410b296d276c79a290c98a9d39011425678d73f86cdf2d8ad91292f","target":"graph","created_at":"2026-07-05T11:51:49Z","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/2508.07644/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The gas-kinetic scheme(GKS) is a promising computational fluid dynamics (CFD) method for solving the Navier-Stokes equations. It is based on the analytical solution of the BGK equation, which enables accurate and robust simulations. While GKS has demonstrated excellent properties (e.g., unified treatment of inviscid and viscous fluxes, inherent adaptive dissipation control), its application to classical engineering problems, such as aerodynamic flows and fluid machinery, remains underdeveloped compared to conventional CFD methods. This study bridges this gap by advancing GKS capabilities for r","authors_text":"Kun Xu, Xing Ji, Yue Zhang","cross_cats":["physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-08-11T05:54:16Z","title":"An implicit gas-kinetic scheme for internal and external flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.07644","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":"sha256:0bd0e903f9047a2dc4d4de01c4aeef7fe370b0fe1262b1420329f7aa9c725f11","target":"record","created_at":"2026-07-05T11:51:49Z","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":"2145db86b16d732ae970aabbd84a6afbecd2da1732d24a07e595e4d7e2b836e2","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-08-11T05:54:16Z","title_canon_sha256":"2b18f70281d880149e9d1060e30e962e803b2a009740c8b8b659764aa2605d38"},"schema_version":"1.0","source":{"id":"2508.07644","kind":"arxiv","version":1}},"canonical_sha256":"eb78d602b3608d2587ca4fff53f41690a1d7412591aa4b76f109de4ec325abfa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eb78d602b3608d2587ca4fff53f41690a1d7412591aa4b76f109de4ec325abfa","first_computed_at":"2026-07-05T11:51:49.708767Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:51:49.708767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BJNxdyYXLRXjPQ7p0o2/oBzsz4Pbtnft3ykrUgTudqh+MfdnW4+3flo6FCpW2g413f0QVuJjwQHp4opWT5juCA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:51:49.709324Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.07644","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0bd0e903f9047a2dc4d4de01c4aeef7fe370b0fe1262b1420329f7aa9c725f11","sha256:71ee67859410b296d276c79a290c98a9d39011425678d73f86cdf2d8ad91292f"],"state_sha256":"69a7f4b8e61ca428f25bd5d946b483dd432a3af68987c5049d91c420249d8717"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vs4HXjWmQDrBcHpxM71raFSaUABTQJJjZJj+XgIiV387mcinuWUPUK0S7jKBNwag6Q81bv0T2DjM/79YKKUNDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T17:08:18.342548Z","bundle_sha256":"be27752e14cf4632ed8962231411e67715d8ee04e9bc7c53be07351bfa9d896a"}}