{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6DA73TY7RGJWVBZTNKC6VKLF2Y","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":"74a5470a4ec17528a487da113d20ed82ec3d462b4a579de0c7212a362108fb3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-18T22:00:31Z","title_canon_sha256":"454318c9aa29faa6df45ba33ef01900a34385f93c2f87df64e79a71dc1ef6d1b"},"schema_version":"1.0","source":{"id":"1707.05876","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05876","created_at":"2026-05-18T00:39:59Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05876v1","created_at":"2026-05-18T00:39:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05876","created_at":"2026-05-18T00:39:59Z"},{"alias_kind":"pith_short_12","alias_value":"6DA73TY7RGJW","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6DA73TY7RGJWVBZT","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6DA73TY7","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:7376d45a7e09aa69a90c0717d25c4d8b36202d87adffe9bbfb0c38c0ea90c3cf","target":"graph","created_at":"2026-05-18T00:39:59Z","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":"Acoustic wave attenuation due to vibrational and rotational molecular relaxation, under simplifying assumptions of near-thermodynamic equilibrium and absence of molecular dissociations, can be accounted for by specifying a bulk viscosity coefficient $\\mu_B$. In this paper, we propose a simple frequency-dependent bulk viscosity model which, under such assumptions, accurately captures wave attenuation rates from infrasonic to ultrasonic frequencies in Navier--Stokes and lattice Boltzmann simulations. The proposed model can be extended to any gas mixture for which molecular relaxation timescales ","authors_text":"Carlo Scalo, Jeffrey Lin, Lambertus Hesselink","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-18T22:00:31Z","title":"Bulk viscosity model for near-equilibrium acoustic wave attenuation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05876","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":"sha256:15dce39c83b913db3f958a47c113547640351af7ca43284e13538eac037d41f1","target":"record","created_at":"2026-05-18T00:39:59Z","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":"74a5470a4ec17528a487da113d20ed82ec3d462b4a579de0c7212a362108fb3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-18T22:00:31Z","title_canon_sha256":"454318c9aa29faa6df45ba33ef01900a34385f93c2f87df64e79a71dc1ef6d1b"},"schema_version":"1.0","source":{"id":"1707.05876","kind":"arxiv","version":1}},"canonical_sha256":"f0c1fdcf1f89936a87336a85eaa965d62c4e3ab211a0c15e8215f2d62454f825","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f0c1fdcf1f89936a87336a85eaa965d62c4e3ab211a0c15e8215f2d62454f825","first_computed_at":"2026-05-18T00:39:59.079044Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:59.079044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mSK5KrKxyiSuXmKNs8NQo/6F8xMQEynmq4fk/Q70jTxZPY0jgAuDqartvbrBVLQIN7BuTv1+rWBbV5hZG4TADg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:59.079478Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.05876","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:15dce39c83b913db3f958a47c113547640351af7ca43284e13538eac037d41f1","sha256:7376d45a7e09aa69a90c0717d25c4d8b36202d87adffe9bbfb0c38c0ea90c3cf"],"state_sha256":"3afe4feba4d3c2f6b340b2a342106235858e1ef4fa174c0e75544b2af5f4f9db"}