{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:I4LSQOYEEQZHJZDWI5PCMRFVAP","short_pith_number":"pith:I4LSQOYE","canonical_record":{"source":{"id":"2606.06331","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-04T16:07:38Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"80e99737e951f58f49a76c784514b79908a68bf73641f2dc3ed92e717eae83cc","abstract_canon_sha256":"12674601389f43631dd49997afaf15f79eca098e34fb0cb52a4ea573cffb2a3a"},"schema_version":"1.0"},"canonical_sha256":"4717283b04243274e476475e2644b503cdab8026d1eebb6cb1573312cc4603bb","source":{"kind":"arxiv","id":"2606.06331","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06331","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06331v1","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06331","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"I4LSQOYEEQZH","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_16","alias_value":"I4LSQOYEEQZHJZDW","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_8","alias_value":"I4LSQOYE","created_at":"2026-06-05T01:15:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:I4LSQOYEEQZHJZDWI5PCMRFVAP","target":"record","payload":{"canonical_record":{"source":{"id":"2606.06331","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-04T16:07:38Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"80e99737e951f58f49a76c784514b79908a68bf73641f2dc3ed92e717eae83cc","abstract_canon_sha256":"12674601389f43631dd49997afaf15f79eca098e34fb0cb52a4ea573cffb2a3a"},"schema_version":"1.0"},"canonical_sha256":"4717283b04243274e476475e2644b503cdab8026d1eebb6cb1573312cc4603bb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-05T01:15:42.068525Z","signature_b64":"moJrMPObQlyR4cInPkCM4A4tzYXqmBKBbmZXsk8TB8jJN95g/H1zjS4Uh3+OOQB7VZBOL8opAyIsf/bKERlFBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4717283b04243274e476475e2644b503cdab8026d1eebb6cb1573312cc4603bb","last_reissued_at":"2026-06-05T01:15:42.068143Z","signature_status":"signed_v1","first_computed_at":"2026-06-05T01:15:42.068143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.06331","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":"2026-06-05T01:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZFR+PdrIZIGvlN8UAOg8Xu0hm5XDNNONIfOgZV7TuinbAZ+jnsZclk8MLue3XfqGoDYx8Fm/u87jtHZK5oPEAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T16:44:21.952453Z"},"content_sha256":"2c57cd3deed88380c46c671ba353b2c02c7d7121cd12d9320ea8dae1cd633912","schema_version":"1.0","event_id":"sha256:2c57cd3deed88380c46c671ba353b2c02c7d7121cd12d9320ea8dae1cd633912"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:I4LSQOYEEQZHJZDWI5PCMRFVAP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An experimental study on the heat transport in porous media convection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Jing Dong, Ke-Qing Xia, Lu Zhang","submitted_at":"2026-06-04T16:07:38Z","abstract_excerpt":"We investigate the heat transport in porous media convection over a wide Rayleigh--Darcy number range of $26.8\\leq Ra\\leq 2.62\\times 10^5$, and a Darcy number range of $6.18\\times10^{-7}\\leq Da\\leq 1.21\\times 10^{-5}$. In the experiments, we employ 3D-printed lattice structures as the solid porous matrix and water as the working fluid. Quantitative analyses of the porous medium Nusselt number $Nu_m$ and local temperature statistics reveal that the present system undergoes a transition through five distinct regimes: I. Conduction, II. Convection, III. Oscillation, IV. Transition, V. Classical R"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06331","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/2606.06331/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":"2026-06-05T01:15:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lchzJE/SbJcF7Lr5zHFZ3Hyq51FZYYAQtfHgTyBTy4LbXCFRa6U7blq4FhuGanhii0BZ9hm5Mhmp46zYaMK7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T16:44:21.952831Z"},"content_sha256":"295228c9e37377405099615e52a68c042b52dd9a6c0ebd2c584d9bda6974d480","schema_version":"1.0","event_id":"sha256:295228c9e37377405099615e52a68c042b52dd9a6c0ebd2c584d9bda6974d480"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/bundle.json","state_url":"https://pith.science/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/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":"2026-07-02T16:44:21Z","links":{"resolver":"https://pith.science/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP","bundle":"https://pith.science/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/bundle.json","state":"https://pith.science/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I4LSQOYEEQZHJZDWI5PCMRFVAP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:I4LSQOYEEQZHJZDWI5PCMRFVAP","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":"12674601389f43631dd49997afaf15f79eca098e34fb0cb52a4ea573cffb2a3a","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-04T16:07:38Z","title_canon_sha256":"80e99737e951f58f49a76c784514b79908a68bf73641f2dc3ed92e717eae83cc"},"schema_version":"1.0","source":{"id":"2606.06331","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06331","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06331v1","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06331","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_12","alias_value":"I4LSQOYEEQZH","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_16","alias_value":"I4LSQOYEEQZHJZDW","created_at":"2026-06-05T01:15:42Z"},{"alias_kind":"pith_short_8","alias_value":"I4LSQOYE","created_at":"2026-06-05T01:15:42Z"}],"graph_snapshots":[{"event_id":"sha256:295228c9e37377405099615e52a68c042b52dd9a6c0ebd2c584d9bda6974d480","target":"graph","created_at":"2026-06-05T01:15:42Z","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/2606.06331/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the heat transport in porous media convection over a wide Rayleigh--Darcy number range of $26.8\\leq Ra\\leq 2.62\\times 10^5$, and a Darcy number range of $6.18\\times10^{-7}\\leq Da\\leq 1.21\\times 10^{-5}$. In the experiments, we employ 3D-printed lattice structures as the solid porous matrix and water as the working fluid. Quantitative analyses of the porous medium Nusselt number $Nu_m$ and local temperature statistics reveal that the present system undergoes a transition through five distinct regimes: I. Conduction, II. Convection, III. Oscillation, IV. Transition, V. Classical R","authors_text":"Jing Dong, Ke-Qing Xia, Lu Zhang","cross_cats":["physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-04T16:07:38Z","title":"An experimental study on the heat transport in porous media convection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06331","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":"sha256:2c57cd3deed88380c46c671ba353b2c02c7d7121cd12d9320ea8dae1cd633912","target":"record","created_at":"2026-06-05T01:15:42Z","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":"12674601389f43631dd49997afaf15f79eca098e34fb0cb52a4ea573cffb2a3a","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-06-04T16:07:38Z","title_canon_sha256":"80e99737e951f58f49a76c784514b79908a68bf73641f2dc3ed92e717eae83cc"},"schema_version":"1.0","source":{"id":"2606.06331","kind":"arxiv","version":1}},"canonical_sha256":"4717283b04243274e476475e2644b503cdab8026d1eebb6cb1573312cc4603bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4717283b04243274e476475e2644b503cdab8026d1eebb6cb1573312cc4603bb","first_computed_at":"2026-06-05T01:15:42.068143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-05T01:15:42.068143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"moJrMPObQlyR4cInPkCM4A4tzYXqmBKBbmZXsk8TB8jJN95g/H1zjS4Uh3+OOQB7VZBOL8opAyIsf/bKERlFBw==","signature_status":"signed_v1","signed_at":"2026-06-05T01:15:42.068525Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.06331","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c57cd3deed88380c46c671ba353b2c02c7d7121cd12d9320ea8dae1cd633912","sha256:295228c9e37377405099615e52a68c042b52dd9a6c0ebd2c584d9bda6974d480"],"state_sha256":"91097c9e32730f92e75eabf9dcec514b786c61499e84b14b107a5a3ec60003ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+EuLfhqgkgh8MigDW/0Ms97ohSQNfH8EVmrnOPT3LsqagQ+iRKuC7SBvlDGW0qxYNr2Z0AxlGAqa1HDzroD4BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T16:44:21.954916Z","bundle_sha256":"94328a059cf0cde8256a14fecd4c2adeea385c8e669b255784f0eaeadb7269f7"}}