{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EP3XC7CJXYOKV347ZYLAVKWPTN","short_pith_number":"pith:EP3XC7CJ","canonical_record":{"source":{"id":"1308.2784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2013-08-13T08:27:21Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"9b48947237cf4ddb80cd530c98714755563d027cfbe6b0be097de1f4ce12abd1","abstract_canon_sha256":"36173db8436a0ca98b7f0630f8fd26751d832417c6f4932c091584a221b38be5"},"schema_version":"1.0"},"canonical_sha256":"23f7717c49be1caaef9fce160aaacf9b7b39ba70bd9ead857ef2be7126e023cb","source":{"kind":"arxiv","id":"1308.2784","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2784","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2784v1","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2784","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"pith_short_12","alias_value":"EP3XC7CJXYOK","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EP3XC7CJXYOKV347","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EP3XC7CJ","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EP3XC7CJXYOKV347ZYLAVKWPTN","target":"record","payload":{"canonical_record":{"source":{"id":"1308.2784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2013-08-13T08:27:21Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"9b48947237cf4ddb80cd530c98714755563d027cfbe6b0be097de1f4ce12abd1","abstract_canon_sha256":"36173db8436a0ca98b7f0630f8fd26751d832417c6f4932c091584a221b38be5"},"schema_version":"1.0"},"canonical_sha256":"23f7717c49be1caaef9fce160aaacf9b7b39ba70bd9ead857ef2be7126e023cb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:16:05.246068Z","signature_b64":"Axs3C1E1RCfviZRjkxTfsBdryYebx+iV8wm5aMVirP9au25416EBHGWufK4aDkMmW3LCxsga5Y84clFssvDkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23f7717c49be1caaef9fce160aaacf9b7b39ba70bd9ead857ef2be7126e023cb","last_reissued_at":"2026-05-18T03:16:05.245618Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:16:05.245618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.2784","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":"2026-05-18T03:16:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ulOp0rEF4oPJ/ySRV3X/6MPfkxJHG5xlOieclJ4nNJUo/nXnERddVafWcQ1KHCmrBSkOp6T6hfxY0tlHqn/+CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:57:59.227774Z"},"content_sha256":"d4468527d51f71557c1aa9a3af8690b7f8ff33528e1dea1cf71b89d593d1cfef","schema_version":"1.0","event_id":"sha256:d4468527d51f71557c1aa9a3af8690b7f8ff33528e1dea1cf71b89d593d1cfef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EP3XC7CJXYOKV347ZYLAVKWPTN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sensitivity studies of heat transfer: forced convection across a cylindrical pipe and duct flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"physics.class-ph","authors_text":"Andrea Ferrantelli, Martti Viljanen, Paul Mel\\'ois","submitted_at":"2013-08-13T08:27:21Z","abstract_excerpt":"We consider two common heat transfer processes and perform a through sensitivity study of the variables involved. We derive and discuss analytical formulas for the heat transfer coefficient in function of film velocity, air temperature and pipe diameter. The according plots relate to a qualitative analysis of the multi-variable function $h$, according to functional optimization. For each process, we provide with graphs and tables of the parameters of interest, such as the Reynolds number. This method of study and the specific values can constitute a useful reference for didactic purposes."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2784","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":"2026-05-18T03:16:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qez46ZSbRh5yCG/H9vUD3qZTqas9h3MAn8c1SgPnYY6ct6/cIceUeOztifhFJCCsUjay4geEMrQyjSiyGtakDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:57:59.228484Z"},"content_sha256":"ce1afda0ab1dae7be9f22459bbb86a9647b273fed6f1cd99045ddf10d2846160","schema_version":"1.0","event_id":"sha256:ce1afda0ab1dae7be9f22459bbb86a9647b273fed6f1cd99045ddf10d2846160"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/bundle.json","state_url":"https://pith.science/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/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":"2026-05-26T13:57:59Z","links":{"resolver":"https://pith.science/pith/EP3XC7CJXYOKV347ZYLAVKWPTN","bundle":"https://pith.science/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/bundle.json","state":"https://pith.science/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EP3XC7CJXYOKV347ZYLAVKWPTN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EP3XC7CJXYOKV347ZYLAVKWPTN","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":"36173db8436a0ca98b7f0630f8fd26751d832417c6f4932c091584a221b38be5","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2013-08-13T08:27:21Z","title_canon_sha256":"9b48947237cf4ddb80cd530c98714755563d027cfbe6b0be097de1f4ce12abd1"},"schema_version":"1.0","source":{"id":"1308.2784","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2784","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2784v1","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2784","created_at":"2026-05-18T03:16:05Z"},{"alias_kind":"pith_short_12","alias_value":"EP3XC7CJXYOK","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EP3XC7CJXYOKV347","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EP3XC7CJ","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:ce1afda0ab1dae7be9f22459bbb86a9647b273fed6f1cd99045ddf10d2846160","target":"graph","created_at":"2026-05-18T03:16:05Z","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":"We consider two common heat transfer processes and perform a through sensitivity study of the variables involved. We derive and discuss analytical formulas for the heat transfer coefficient in function of film velocity, air temperature and pipe diameter. The according plots relate to a qualitative analysis of the multi-variable function $h$, according to functional optimization. For each process, we provide with graphs and tables of the parameters of interest, such as the Reynolds number. This method of study and the specific values can constitute a useful reference for didactic purposes.","authors_text":"Andrea Ferrantelli, Martti Viljanen, Paul Mel\\'ois","cross_cats":["physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2013-08-13T08:27:21Z","title":"Sensitivity studies of heat transfer: forced convection across a cylindrical pipe and duct flow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2784","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:d4468527d51f71557c1aa9a3af8690b7f8ff33528e1dea1cf71b89d593d1cfef","target":"record","created_at":"2026-05-18T03:16:05Z","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":"36173db8436a0ca98b7f0630f8fd26751d832417c6f4932c091584a221b38be5","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2013-08-13T08:27:21Z","title_canon_sha256":"9b48947237cf4ddb80cd530c98714755563d027cfbe6b0be097de1f4ce12abd1"},"schema_version":"1.0","source":{"id":"1308.2784","kind":"arxiv","version":1}},"canonical_sha256":"23f7717c49be1caaef9fce160aaacf9b7b39ba70bd9ead857ef2be7126e023cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23f7717c49be1caaef9fce160aaacf9b7b39ba70bd9ead857ef2be7126e023cb","first_computed_at":"2026-05-18T03:16:05.245618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:16:05.245618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Axs3C1E1RCfviZRjkxTfsBdryYebx+iV8wm5aMVirP9au25416EBHGWufK4aDkMmW3LCxsga5Y84clFssvDkBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:16:05.246068Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.2784","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4468527d51f71557c1aa9a3af8690b7f8ff33528e1dea1cf71b89d593d1cfef","sha256:ce1afda0ab1dae7be9f22459bbb86a9647b273fed6f1cd99045ddf10d2846160"],"state_sha256":"97ecc7f4b017d90eeedf2715d2ff91681b442b9f9edace6d9669ceaccb24c8bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HWVlZUMXmTOrz0Bvba5LzuBpAptxh4XTdJzqAJPnanUL3qYNW59/H8ClTehjoLRRHVmS9uZKMLnf3WbhWoBWDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:57:59.232101Z","bundle_sha256":"c60c7213514d3d18637b33ce330c4151b014e5165e7c3f5aa4f85ea171b52780"}}