{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3","short_pith_number":"pith:SJ6YJWMU","schema_version":"1.0","canonical_sha256":"927d84d994baaa54133e7749a5a7d84efcae3b5867c34a35dd032e0a30daa6e2","source":{"kind":"arxiv","id":"1212.5201","version":1},"attestation_state":"computed","paper":{"title":"Flow stabilization with active hydrodynamic cloaks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"David R. Smith, Yaroslav A. Urzhumov","submitted_at":"2012-12-20T19:28:47Z","abstract_excerpt":"We demonstrate that fluid flow cloaking solutions based on active hydrodynamic metamaterials exist for two-dimensional flows past a cylinder in a wide range of Reynolds numbers, up to approximately 200. Within the framework of the classical Brinkman equation for homogenized porous flow, we demonstrate using two different methods that such cloaked flows can be dynamically stable for $Re$ in the range 5-119. The first, highly efficient, method is based on a linearization of the Brinkman-Navier-Stokes equation and finding the eigenfrequencies of the least stable eigen-perturbations; the second me"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1212.5201","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2012-12-20T19:28:47Z","cross_cats_sorted":[],"title_canon_sha256":"aa204154f454249f90bccc41b9cccf50626ee206f94286cc89dcb0481c06e1a9","abstract_canon_sha256":"9e4e9a96de4926ee43eea7d19d0c413a8fedd6b6a3adfd00dd106a8ecfb6d4a5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:03.204802Z","signature_b64":"gpBkZt4Dqbx0MctDGykUQ/37NE9U5WheF/LLT140qfeMC+eMTCXcH/HTKw+ptCdRsZhbHVOtPOqLgA0LOluBDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"927d84d994baaa54133e7749a5a7d84efcae3b5867c34a35dd032e0a30daa6e2","last_reissued_at":"2026-05-18T03:38:03.204024Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:03.204024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Flow stabilization with active hydrodynamic cloaks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"David R. Smith, Yaroslav A. Urzhumov","submitted_at":"2012-12-20T19:28:47Z","abstract_excerpt":"We demonstrate that fluid flow cloaking solutions based on active hydrodynamic metamaterials exist for two-dimensional flows past a cylinder in a wide range of Reynolds numbers, up to approximately 200. Within the framework of the classical Brinkman equation for homogenized porous flow, we demonstrate using two different methods that such cloaked flows can be dynamically stable for $Re$ in the range 5-119. The first, highly efficient, method is based on a linearization of the Brinkman-Navier-Stokes equation and finding the eigenfrequencies of the least stable eigen-perturbations; the second me"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.5201","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1212.5201","created_at":"2026-05-18T03:38:03.204128+00:00"},{"alias_kind":"arxiv_version","alias_value":"1212.5201v1","created_at":"2026-05-18T03:38:03.204128+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.5201","created_at":"2026-05-18T03:38:03.204128+00:00"},{"alias_kind":"pith_short_12","alias_value":"SJ6YJWMUXKVF","created_at":"2026-05-18T12:27:20.899486+00:00"},{"alias_kind":"pith_short_16","alias_value":"SJ6YJWMUXKVFIEZ6","created_at":"2026-05-18T12:27:20.899486+00:00"},{"alias_kind":"pith_short_8","alias_value":"SJ6YJWMU","created_at":"2026-05-18T12:27:20.899486+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3","json":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3.json","graph_json":"https://pith.science/api/pith-number/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/graph.json","events_json":"https://pith.science/api/pith-number/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/events.json","paper":"https://pith.science/paper/SJ6YJWMU"},"agent_actions":{"view_html":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3","download_json":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3.json","view_paper":"https://pith.science/paper/SJ6YJWMU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1212.5201&json=true","fetch_graph":"https://pith.science/api/pith-number/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/graph.json","fetch_events":"https://pith.science/api/pith-number/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/action/storage_attestation","attest_author":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/action/author_attestation","sign_citation":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/action/citation_signature","submit_replication":"https://pith.science/pith/SJ6YJWMUXKVFIEZ6O5E2LJ6YJ3/action/replication_record"}},"created_at":"2026-05-18T03:38:03.204128+00:00","updated_at":"2026-05-18T03:38:03.204128+00:00"}