{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GZQYHNOYZ3SW6OZ6YWB5G7VUST","short_pith_number":"pith:GZQYHNOY","canonical_record":{"source":{"id":"1801.02038","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-01-06T15:49:41Z","cross_cats_sorted":[],"title_canon_sha256":"ff23e5d18c1f7f30aa3a8584333c8fd27e7001d8e7d235dcce47f33671ed8d0e","abstract_canon_sha256":"f41bb1f0934aa8be34bb5cef3fcd3f33b28b84b01e1ce274360aefc86e9e84ac"},"schema_version":"1.0"},"canonical_sha256":"366183b5d8cee56f3b3ec583d37eb494dbc5ee0c3c1d248d6c601710e5a8488b","source":{"kind":"arxiv","id":"1801.02038","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02038","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02038v1","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02038","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"pith_short_12","alias_value":"GZQYHNOYZ3SW","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GZQYHNOYZ3SW6OZ6","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GZQYHNOY","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GZQYHNOYZ3SW6OZ6YWB5G7VUST","target":"record","payload":{"canonical_record":{"source":{"id":"1801.02038","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-01-06T15:49:41Z","cross_cats_sorted":[],"title_canon_sha256":"ff23e5d18c1f7f30aa3a8584333c8fd27e7001d8e7d235dcce47f33671ed8d0e","abstract_canon_sha256":"f41bb1f0934aa8be34bb5cef3fcd3f33b28b84b01e1ce274360aefc86e9e84ac"},"schema_version":"1.0"},"canonical_sha256":"366183b5d8cee56f3b3ec583d37eb494dbc5ee0c3c1d248d6c601710e5a8488b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:35.090586Z","signature_b64":"mqhAw1Ih+isJyXrSTFwsKL8MN66/oJ4G6asvgSxRjuZCo9kfCXg65NkX8w0EH0JR3vBG5XRRvwUbfvHC+cMKBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"366183b5d8cee56f3b3ec583d37eb494dbc5ee0c3c1d248d6c601710e5a8488b","last_reissued_at":"2026-05-18T00:26:35.090033Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:35.090033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.02038","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":"2026-05-18T00:26:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mNQju/xDLMiNYjrA40AkfSr/UakfdPN/VPA2fV+ncdM8xQgZQNEP2tu7q6Ph2N5mhDu9j++4q9d2VQit+HBPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:37:28.892347Z"},"content_sha256":"f9ec28a3464767150ad9728f8f3de57afd57fd7e4e9deafd2b0b2f289cabbbbe","schema_version":"1.0","event_id":"sha256:f9ec28a3464767150ad9728f8f3de57afd57fd7e4e9deafd2b0b2f289cabbbbe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GZQYHNOYZ3SW6OZ6YWB5G7VUST","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stability of concentrated suspensions under Couette and Poiseuille flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Andreas M\\\"unch, Barbara Niethammer, Barbara Wagner, Tobias Ahnert","submitted_at":"2018-01-06T15:49:41Z","abstract_excerpt":"The stability of two-dimensional Poiseuille flow and plane Couette flow for concentrated suspensions is investigated. Linear stability analysis of the two-phase flow model for both flow geometries shows the existence of a convectively driven instability with increasing growth rates of the unstable modes as the particle volume fraction of the suspension increases. In addition it is shown that there exists a bound for the particle phase viscosity below which the two-phase flow model may become ill-posed as the particle phase approaches its maximum packing fraction. The case of two-dimensional Po"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02038","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":"2026-05-18T00:26:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y3rZWj1ailhEDhysJj2tkzDjdXUEklu7oNc9AoDaoBny3NT1PYMetggZgME/FtpmzvsRNqwknaYICvJ/0gQVBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T10:37:28.892684Z"},"content_sha256":"54aff116a464baa43508dce5824643cc03578d4545f5c70685370fb6dea8070e","schema_version":"1.0","event_id":"sha256:54aff116a464baa43508dce5824643cc03578d4545f5c70685370fb6dea8070e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/bundle.json","state_url":"https://pith.science/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/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":"2026-06-25T10:37:28Z","links":{"resolver":"https://pith.science/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST","bundle":"https://pith.science/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/bundle.json","state":"https://pith.science/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GZQYHNOYZ3SW6OZ6YWB5G7VUST/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GZQYHNOYZ3SW6OZ6YWB5G7VUST","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":"f41bb1f0934aa8be34bb5cef3fcd3f33b28b84b01e1ce274360aefc86e9e84ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-01-06T15:49:41Z","title_canon_sha256":"ff23e5d18c1f7f30aa3a8584333c8fd27e7001d8e7d235dcce47f33671ed8d0e"},"schema_version":"1.0","source":{"id":"1801.02038","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02038","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02038v1","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02038","created_at":"2026-05-18T00:26:35Z"},{"alias_kind":"pith_short_12","alias_value":"GZQYHNOYZ3SW","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GZQYHNOYZ3SW6OZ6","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GZQYHNOY","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:54aff116a464baa43508dce5824643cc03578d4545f5c70685370fb6dea8070e","target":"graph","created_at":"2026-05-18T00:26:35Z","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":"The stability of two-dimensional Poiseuille flow and plane Couette flow for concentrated suspensions is investigated. Linear stability analysis of the two-phase flow model for both flow geometries shows the existence of a convectively driven instability with increasing growth rates of the unstable modes as the particle volume fraction of the suspension increases. In addition it is shown that there exists a bound for the particle phase viscosity below which the two-phase flow model may become ill-posed as the particle phase approaches its maximum packing fraction. The case of two-dimensional Po","authors_text":"Andreas M\\\"unch, Barbara Niethammer, Barbara Wagner, Tobias Ahnert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-01-06T15:49:41Z","title":"Stability of concentrated suspensions under Couette and Poiseuille flow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02038","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:f9ec28a3464767150ad9728f8f3de57afd57fd7e4e9deafd2b0b2f289cabbbbe","target":"record","created_at":"2026-05-18T00:26:35Z","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":"f41bb1f0934aa8be34bb5cef3fcd3f33b28b84b01e1ce274360aefc86e9e84ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-01-06T15:49:41Z","title_canon_sha256":"ff23e5d18c1f7f30aa3a8584333c8fd27e7001d8e7d235dcce47f33671ed8d0e"},"schema_version":"1.0","source":{"id":"1801.02038","kind":"arxiv","version":1}},"canonical_sha256":"366183b5d8cee56f3b3ec583d37eb494dbc5ee0c3c1d248d6c601710e5a8488b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"366183b5d8cee56f3b3ec583d37eb494dbc5ee0c3c1d248d6c601710e5a8488b","first_computed_at":"2026-05-18T00:26:35.090033Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:35.090033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mqhAw1Ih+isJyXrSTFwsKL8MN66/oJ4G6asvgSxRjuZCo9kfCXg65NkX8w0EH0JR3vBG5XRRvwUbfvHC+cMKBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:35.090586Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02038","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9ec28a3464767150ad9728f8f3de57afd57fd7e4e9deafd2b0b2f289cabbbbe","sha256:54aff116a464baa43508dce5824643cc03578d4545f5c70685370fb6dea8070e"],"state_sha256":"2ca01934d0eb710be46114e851fd8853ae7cae285e56d1a97d4593a182d04067"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rJRlOFfr4geTqIl9eO75sqjvMd+eaBuXUAS7yUSwOFEte6AhT1g+nRRej43wiLpQlSiOTBjbsPEdyDJwNP+pDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T10:37:28.894526Z","bundle_sha256":"7b04721a3baf1ef659a47b417129d9c98ecfc7f3550db4be7725b83e6bddb41a"}}