{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:CTHP3VBIMRSJVHLPL3TMQCXCOP","short_pith_number":"pith:CTHP3VBI","canonical_record":{"source":{"id":"1707.08217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-25T20:57:33Z","cross_cats_sorted":[],"title_canon_sha256":"3d31f6a89c73806140b6d11684e2c0bd41f5ff0c0aa29915b7108edfd13e8268","abstract_canon_sha256":"a2d133428dbd843f43f0cfb7a2a75290ce7dbbe11598eb6be78f80cff5c1e48c"},"schema_version":"1.0"},"canonical_sha256":"14cefdd42864649a9d6f5ee6c80ae273ddbece4ff9bed91e35bde48ee617947a","source":{"kind":"arxiv","id":"1707.08217","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.08217","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"arxiv_version","alias_value":"1707.08217v1","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.08217","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"pith_short_12","alias_value":"CTHP3VBIMRSJ","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"CTHP3VBIMRSJVHLP","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"CTHP3VBI","created_at":"2026-05-18T12:31:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:CTHP3VBIMRSJVHLPL3TMQCXCOP","target":"record","payload":{"canonical_record":{"source":{"id":"1707.08217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-25T20:57:33Z","cross_cats_sorted":[],"title_canon_sha256":"3d31f6a89c73806140b6d11684e2c0bd41f5ff0c0aa29915b7108edfd13e8268","abstract_canon_sha256":"a2d133428dbd843f43f0cfb7a2a75290ce7dbbe11598eb6be78f80cff5c1e48c"},"schema_version":"1.0"},"canonical_sha256":"14cefdd42864649a9d6f5ee6c80ae273ddbece4ff9bed91e35bde48ee617947a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:24.924593Z","signature_b64":"dvYu3XijYt2Rpamj2+R4a8cqkxl4g37nlurKZxuEIPxzy8q2j/alZ2WLe1y40RcEe/kEbZvEGFaMwMdo1E98CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"14cefdd42864649a9d6f5ee6c80ae273ddbece4ff9bed91e35bde48ee617947a","last_reissued_at":"2026-05-18T00:39:24.924138Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:24.924138Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.08217","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":"2026-05-18T00:39:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"329wTv+39KKjmaidoTHBc46e9hI4m466598wat4pHpPtRXtUb7w96qup2bNz+r8h0aRERMZFaWi3RrLT5p3DDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:57:34.361956Z"},"content_sha256":"29ba80ba43256ed082f5211ae9652d8346ebc84338300e33b4a72c7fdea197ae","schema_version":"1.0","event_id":"sha256:29ba80ba43256ed082f5211ae9652d8346ebc84338300e33b4a72c7fdea197ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:CTHP3VBIMRSJVHLPL3TMQCXCOP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct Numerical Simulation of Turbulent Channel Flow with Riblets at Low Reynolds Number","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Bettina Frohnapfel, Verena Fink","submitted_at":"2017-07-25T20:57:33Z","abstract_excerpt":"In this report we briefly summarize the set-up and results for direct numerical simulations (DNS) of turbulent channel flows with riblets. The DNS are carried out with OpenFOAM which allows the use of an unstructured mesh. The present results were presented at the European Drag Reduction and Flow Control Meeting in 2015."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08217","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:39:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2U6cp0TqBa1wU2C8d920Px6iUBtBvSmfo+w/mNnY5s5MKp7RuH4Oa4OAi1LeGtK4AvyHZTuNpeFQaI6rgVYVCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:57:34.362692Z"},"content_sha256":"18076a245bdb5a3b1f608225d63ee751ef39daf1bedd17fb7283e7ea66d209bf","schema_version":"1.0","event_id":"sha256:18076a245bdb5a3b1f608225d63ee751ef39daf1bedd17fb7283e7ea66d209bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/bundle.json","state_url":"https://pith.science/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/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":"2026-06-08T20:57:34Z","links":{"resolver":"https://pith.science/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP","bundle":"https://pith.science/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/bundle.json","state":"https://pith.science/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CTHP3VBIMRSJVHLPL3TMQCXCOP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:CTHP3VBIMRSJVHLPL3TMQCXCOP","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":"a2d133428dbd843f43f0cfb7a2a75290ce7dbbe11598eb6be78f80cff5c1e48c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-25T20:57:33Z","title_canon_sha256":"3d31f6a89c73806140b6d11684e2c0bd41f5ff0c0aa29915b7108edfd13e8268"},"schema_version":"1.0","source":{"id":"1707.08217","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.08217","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"arxiv_version","alias_value":"1707.08217v1","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.08217","created_at":"2026-05-18T00:39:24Z"},{"alias_kind":"pith_short_12","alias_value":"CTHP3VBIMRSJ","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"CTHP3VBIMRSJVHLP","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"CTHP3VBI","created_at":"2026-05-18T12:31:10Z"}],"graph_snapshots":[{"event_id":"sha256:18076a245bdb5a3b1f608225d63ee751ef39daf1bedd17fb7283e7ea66d209bf","target":"graph","created_at":"2026-05-18T00:39:24Z","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":"In this report we briefly summarize the set-up and results for direct numerical simulations (DNS) of turbulent channel flows with riblets. The DNS are carried out with OpenFOAM which allows the use of an unstructured mesh. The present results were presented at the European Drag Reduction and Flow Control Meeting in 2015.","authors_text":"Bettina Frohnapfel, Verena Fink","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-25T20:57:33Z","title":"Direct Numerical Simulation of Turbulent Channel Flow with Riblets at Low Reynolds Number"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08217","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":"sha256:29ba80ba43256ed082f5211ae9652d8346ebc84338300e33b4a72c7fdea197ae","target":"record","created_at":"2026-05-18T00:39:24Z","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":"a2d133428dbd843f43f0cfb7a2a75290ce7dbbe11598eb6be78f80cff5c1e48c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-07-25T20:57:33Z","title_canon_sha256":"3d31f6a89c73806140b6d11684e2c0bd41f5ff0c0aa29915b7108edfd13e8268"},"schema_version":"1.0","source":{"id":"1707.08217","kind":"arxiv","version":1}},"canonical_sha256":"14cefdd42864649a9d6f5ee6c80ae273ddbece4ff9bed91e35bde48ee617947a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"14cefdd42864649a9d6f5ee6c80ae273ddbece4ff9bed91e35bde48ee617947a","first_computed_at":"2026-05-18T00:39:24.924138Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:24.924138Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dvYu3XijYt2Rpamj2+R4a8cqkxl4g37nlurKZxuEIPxzy8q2j/alZ2WLe1y40RcEe/kEbZvEGFaMwMdo1E98CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:24.924593Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.08217","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29ba80ba43256ed082f5211ae9652d8346ebc84338300e33b4a72c7fdea197ae","sha256:18076a245bdb5a3b1f608225d63ee751ef39daf1bedd17fb7283e7ea66d209bf"],"state_sha256":"8ba72a79c01ce03d548bde72a67f08d63082c1605e617412d262bdbea47eea91"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WCQlmbtvTPAa0pn8DFcGcS36Ks8jhQVznVuVXrF1SA8UjT5A4/krVXiYUluNvYDecWcaLCmNpE2Pgflb9cb+BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T20:57:34.366596Z","bundle_sha256":"f54d332035d323404c2ca2866fd19036d9fccfb0b56509d17766a752fa333e54"}}