{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7DHFGS2WKYQ6N6KCA3F7WHY5P5","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":"0442444b8b694ceb311320d31f864bbbdd53284874f34c7d46cd54b8f2aa39dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-05-19T13:50:03Z","title_canon_sha256":"4fbbbffe0c988f5ec24d2de121cd7b34575d3469ce1242a4ec62074f4e7d4978"},"schema_version":"1.0","source":{"id":"2005.09446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.09446","created_at":"2026-07-05T01:03:50Z"},{"alias_kind":"arxiv_version","alias_value":"2005.09446v1","created_at":"2026-07-05T01:03:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.09446","created_at":"2026-07-05T01:03:50Z"},{"alias_kind":"pith_short_12","alias_value":"7DHFGS2WKYQ6","created_at":"2026-07-05T01:03:50Z"},{"alias_kind":"pith_short_16","alias_value":"7DHFGS2WKYQ6N6KC","created_at":"2026-07-05T01:03:50Z"},{"alias_kind":"pith_short_8","alias_value":"7DHFGS2W","created_at":"2026-07-05T01:03:50Z"}],"graph_snapshots":[{"event_id":"sha256:1fe630b42a7eef076796d17c1c0f419eb878663d95a51bf306b12bde07c78360","target":"graph","created_at":"2026-07-05T01:03:50Z","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/2005.09446/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We perform a numerical study of the heat transfer and flow structure of Rayleigh-B\\'enard (RB) convection in (in most cases regular) porous media, which are comprised of circular, solid obstacles located on a square lattice. This study is focused on the role of porosity $\\phi$ in the flow properties during the transition process from the traditional RB convection with $\\phi=1$ (so no obstacles included) to Darcy-type porous-media convection with $\\phi$ approaching 0. Simulations are carried out in a cell with unity aspect ratio, for the Rayleigh number $Ra$ from $10^5$ to $10^{10}$ and varying","authors_text":"Chao Sun, Detlef Lohse, Kai Leong Chong, Linfeng Jiang, Richard J. A. M. Stevens, Roberto Verzicco, Shuang Liu, Xiaojue Zhu, Zhen-Hua Wan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-05-19T13:50:03Z","title":"From Rayleigh-B\\'enard convection to porous-media convection: how porosity affects heat transfer and flow structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.09446","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":"sha256:54f10220e14a987b7cd5510ce47524ed640fa793ea5b6e512834108eaee66d93","target":"record","created_at":"2026-07-05T01:03:50Z","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":"0442444b8b694ceb311320d31f864bbbdd53284874f34c7d46cd54b8f2aa39dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-05-19T13:50:03Z","title_canon_sha256":"4fbbbffe0c988f5ec24d2de121cd7b34575d3469ce1242a4ec62074f4e7d4978"},"schema_version":"1.0","source":{"id":"2005.09446","kind":"arxiv","version":1}},"canonical_sha256":"f8ce534b565621e6f94206cbfb1f1d7f54acef4ddeda3ef066f72d4703ca130c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f8ce534b565621e6f94206cbfb1f1d7f54acef4ddeda3ef066f72d4703ca130c","first_computed_at":"2026-07-05T01:03:50.309330Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:03:50.309330Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XVRbDR8XV56782Bw+qjZdmUZ2MIQIOutQkwfq+NJFZCjHvvgP6HKLF5GHC07qc9XtFspI++mCFL/1iB3jopMDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:03:50.309657Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.09446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54f10220e14a987b7cd5510ce47524ed640fa793ea5b6e512834108eaee66d93","sha256:1fe630b42a7eef076796d17c1c0f419eb878663d95a51bf306b12bde07c78360"],"state_sha256":"04073e4183c8615a12a550ba1cc02915f6ab14f4ca5b7b06174a1dba55a966a2"}