{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:M4G7KCBW6344Q2CUTGBUACIBRH","short_pith_number":"pith:M4G7KCBW","canonical_record":{"source":{"id":"1709.09141","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-09-26T17:24:44Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"453d05d9b17687434d1ea11021438e519f408545f8710f489f4a247dfad2ae06","abstract_canon_sha256":"2cd1eacfa96283486fb39813400f0460e1e3a69379ad791274e0e87be9925017"},"schema_version":"1.0"},"canonical_sha256":"670df50836f6f9c86854998340090189edb1755d35b88b0d16bd0ebda1273d5b","source":{"kind":"arxiv","id":"1709.09141","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.09141","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"arxiv_version","alias_value":"1709.09141v1","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.09141","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"pith_short_12","alias_value":"M4G7KCBW6344","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"M4G7KCBW6344Q2CU","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"M4G7KCBW","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:M4G7KCBW6344Q2CUTGBUACIBRH","target":"record","payload":{"canonical_record":{"source":{"id":"1709.09141","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-09-26T17:24:44Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"453d05d9b17687434d1ea11021438e519f408545f8710f489f4a247dfad2ae06","abstract_canon_sha256":"2cd1eacfa96283486fb39813400f0460e1e3a69379ad791274e0e87be9925017"},"schema_version":"1.0"},"canonical_sha256":"670df50836f6f9c86854998340090189edb1755d35b88b0d16bd0ebda1273d5b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:21.062775Z","signature_b64":"mw/NzZ6bQv+YYdwd1gb3ij0LYX3WBC/jVnyBgoC/LKDYfE9zzxkPgpLZKma91fCLk00Jxj1quUlrhyag9X+oDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"670df50836f6f9c86854998340090189edb1755d35b88b0d16bd0ebda1273d5b","last_reissued_at":"2026-05-18T00:34:21.062283Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:21.062283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.09141","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":"2026-05-18T00:34:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fu5y2dNb/BwaIR1BNu4hpQkPdPSsGYNLDQGZoU4xvSp1CGGAr3FKDtU8kjgqr9nW/fxdQayihE8VF5oZLKyyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:38:38.644338Z"},"content_sha256":"48496203ea9bef4bb0775bbb01753c6071c32a1f2969924fb85ee9198b6d225b","schema_version":"1.0","event_id":"sha256:48496203ea9bef4bb0775bbb01753c6071c32a1f2969924fb85ee9198b6d225b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:M4G7KCBW6344Q2CUTGBUACIBRH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonreflecting outlet boundary conditions for incompressible flows using SPH","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Carlos E. Alvarado-Rodr\\'iguez, Eduardo de la Cruz S\\'anchez, Jaime Klapp, Jos\\'e M. Dom\\'inguez, Leonardo Di G. Sigalotti","submitted_at":"2017-09-26T17:24:44Z","abstract_excerpt":"In this paper we implement a simple strategy, based on Jin and Braza's method, to deal with nonreflecting outlet boundary conditions for incompressible Navier-Stokes flows using the method of smoothed particle hydrodynamics (SPH). The outflow boundary conditions are implemented using an outflow zone downstream of the outlet, where particles are moved using an outgoing wave equation for the velocity field so that feedback noise from the outlet boundary is greatly reduced. For unidirectional flow across the outlet, this condition reduces to Orlanski's wave equation. The performance of the method"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.09141","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":"2026-05-18T00:34:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cls1KelFpl14/jePLzp/ivpLzdV7vcq5cRe9yD3GY0u7C19aZZ0wbxNm3eerd6U5LtQ7bJUueOwRrn0smDQBCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:38:38.644697Z"},"content_sha256":"3c024fc85951ca90717d78642e5f6e0858d784dbc1bdf999135a5bceeef1d5cd","schema_version":"1.0","event_id":"sha256:3c024fc85951ca90717d78642e5f6e0858d784dbc1bdf999135a5bceeef1d5cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M4G7KCBW6344Q2CUTGBUACIBRH/bundle.json","state_url":"https://pith.science/pith/M4G7KCBW6344Q2CUTGBUACIBRH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M4G7KCBW6344Q2CUTGBUACIBRH/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":"2026-06-24T05:38:38Z","links":{"resolver":"https://pith.science/pith/M4G7KCBW6344Q2CUTGBUACIBRH","bundle":"https://pith.science/pith/M4G7KCBW6344Q2CUTGBUACIBRH/bundle.json","state":"https://pith.science/pith/M4G7KCBW6344Q2CUTGBUACIBRH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M4G7KCBW6344Q2CUTGBUACIBRH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:M4G7KCBW6344Q2CUTGBUACIBRH","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":"2cd1eacfa96283486fb39813400f0460e1e3a69379ad791274e0e87be9925017","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-09-26T17:24:44Z","title_canon_sha256":"453d05d9b17687434d1ea11021438e519f408545f8710f489f4a247dfad2ae06"},"schema_version":"1.0","source":{"id":"1709.09141","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.09141","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"arxiv_version","alias_value":"1709.09141v1","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.09141","created_at":"2026-05-18T00:34:21Z"},{"alias_kind":"pith_short_12","alias_value":"M4G7KCBW6344","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"M4G7KCBW6344Q2CU","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"M4G7KCBW","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:3c024fc85951ca90717d78642e5f6e0858d784dbc1bdf999135a5bceeef1d5cd","target":"graph","created_at":"2026-05-18T00:34:21Z","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 paper we implement a simple strategy, based on Jin and Braza's method, to deal with nonreflecting outlet boundary conditions for incompressible Navier-Stokes flows using the method of smoothed particle hydrodynamics (SPH). The outflow boundary conditions are implemented using an outflow zone downstream of the outlet, where particles are moved using an outgoing wave equation for the velocity field so that feedback noise from the outlet boundary is greatly reduced. For unidirectional flow across the outlet, this condition reduces to Orlanski's wave equation. The performance of the method","authors_text":"Carlos E. Alvarado-Rodr\\'iguez, Eduardo de la Cruz S\\'anchez, Jaime Klapp, Jos\\'e M. Dom\\'inguez, Leonardo Di G. Sigalotti","cross_cats":["physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-09-26T17:24:44Z","title":"Nonreflecting outlet boundary conditions for incompressible flows using SPH"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.09141","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":"sha256:48496203ea9bef4bb0775bbb01753c6071c32a1f2969924fb85ee9198b6d225b","target":"record","created_at":"2026-05-18T00:34:21Z","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":"2cd1eacfa96283486fb39813400f0460e1e3a69379ad791274e0e87be9925017","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-09-26T17:24:44Z","title_canon_sha256":"453d05d9b17687434d1ea11021438e519f408545f8710f489f4a247dfad2ae06"},"schema_version":"1.0","source":{"id":"1709.09141","kind":"arxiv","version":1}},"canonical_sha256":"670df50836f6f9c86854998340090189edb1755d35b88b0d16bd0ebda1273d5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"670df50836f6f9c86854998340090189edb1755d35b88b0d16bd0ebda1273d5b","first_computed_at":"2026-05-18T00:34:21.062283Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:21.062283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mw/NzZ6bQv+YYdwd1gb3ij0LYX3WBC/jVnyBgoC/LKDYfE9zzxkPgpLZKma91fCLk00Jxj1quUlrhyag9X+oDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:21.062775Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.09141","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48496203ea9bef4bb0775bbb01753c6071c32a1f2969924fb85ee9198b6d225b","sha256:3c024fc85951ca90717d78642e5f6e0858d784dbc1bdf999135a5bceeef1d5cd"],"state_sha256":"9f6805c1dccaec6748fa1e0953cc1512647a32fa7e54e67cb2b74939bad7def1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VmGBRJwGQsJSekWHLgH9Ssnw2o4vvpuKUeqs2XphBca0UK9u+l+XJGJd5iLOs0OnkMgBFS3uFgvgZxe9u57gCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T05:38:38.646703Z","bundle_sha256":"f44052a162da9066495d43ecd885d051b1bc1908a3965961145e5f65828ea1f9"}}