{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:KPAOWZ35PTVGKB3V7C3KRRRZZ5","short_pith_number":"pith:KPAOWZ35","schema_version":"1.0","canonical_sha256":"53c0eb677d7cea650775f8b6a8c639cf6d1b0415efa57d803381a10d710042a4","source":{"kind":"arxiv","id":"1803.03638","version":2},"attestation_state":"computed","paper":{"title":"On the Numerical Robustness of the Streaming Instability: Particle Concentration and Gas Dynamics in Protoplanetary Disks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Andrew N. Youdin, Jacob B. Simon, Rixin Li","submitted_at":"2018-03-09T18:59:41Z","abstract_excerpt":"The Streaming Instability (SI) is a mechanism to concentrate solids in protoplanetary disks. Nonlinear particle clumping from the SI can trigger gravitational collapse into planetesimals. To better understand the numerical robustness of the SI, we perform a suite of vertically-stratified 3D simulations with fixed physical parameters known to produce strong clumping. We vary the numerical implementation, namely the computational domain size and the vertical boundary conditions (vBCs), comparing newly-implemented outflow vBCs to the previously-used periodic and reflecting vBCs. We find strong pa"},"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":"1803.03638","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-09T18:59:41Z","cross_cats_sorted":[],"title_canon_sha256":"2d043dfeb28246c5b437b46dfc88b091fb4bd0d81b3299b5165894614c822f3c","abstract_canon_sha256":"e93364eb790f7f14ed1c60f2ec3173b1c1370a6018e74dbfd8d591cb66e34f60"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:26.732911Z","signature_b64":"/5w2AZO6MaFpt6wd7W6qSt8XExlXmyev3uz49SRcrCjg4biyVGPZJt0ye4KyagR1eEkzJxUP5WaHLW0JaM2WDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53c0eb677d7cea650775f8b6a8c639cf6d1b0415efa57d803381a10d710042a4","last_reissued_at":"2026-05-18T00:09:26.732207Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:26.732207Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the Numerical Robustness of the Streaming Instability: Particle Concentration and Gas Dynamics in Protoplanetary Disks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Andrew N. Youdin, Jacob B. Simon, Rixin Li","submitted_at":"2018-03-09T18:59:41Z","abstract_excerpt":"The Streaming Instability (SI) is a mechanism to concentrate solids in protoplanetary disks. Nonlinear particle clumping from the SI can trigger gravitational collapse into planetesimals. To better understand the numerical robustness of the SI, we perform a suite of vertically-stratified 3D simulations with fixed physical parameters known to produce strong clumping. We vary the numerical implementation, namely the computational domain size and the vertical boundary conditions (vBCs), comparing newly-implemented outflow vBCs to the previously-used periodic and reflecting vBCs. We find strong pa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03638","kind":"arxiv","version":2},"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":"1803.03638","created_at":"2026-05-18T00:09:26.732336+00:00"},{"alias_kind":"arxiv_version","alias_value":"1803.03638v2","created_at":"2026-05-18T00:09:26.732336+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.03638","created_at":"2026-05-18T00:09:26.732336+00:00"},{"alias_kind":"pith_short_12","alias_value":"KPAOWZ35PTVG","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_16","alias_value":"KPAOWZ35PTVGKB3V","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_8","alias_value":"KPAOWZ35","created_at":"2026-05-18T12:32:33.847187+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/KPAOWZ35PTVGKB3V7C3KRRRZZ5","json":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5.json","graph_json":"https://pith.science/api/pith-number/KPAOWZ35PTVGKB3V7C3KRRRZZ5/graph.json","events_json":"https://pith.science/api/pith-number/KPAOWZ35PTVGKB3V7C3KRRRZZ5/events.json","paper":"https://pith.science/paper/KPAOWZ35"},"agent_actions":{"view_html":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5","download_json":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5.json","view_paper":"https://pith.science/paper/KPAOWZ35","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1803.03638&json=true","fetch_graph":"https://pith.science/api/pith-number/KPAOWZ35PTVGKB3V7C3KRRRZZ5/graph.json","fetch_events":"https://pith.science/api/pith-number/KPAOWZ35PTVGKB3V7C3KRRRZZ5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5/action/storage_attestation","attest_author":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5/action/author_attestation","sign_citation":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5/action/citation_signature","submit_replication":"https://pith.science/pith/KPAOWZ35PTVGKB3V7C3KRRRZZ5/action/replication_record"}},"created_at":"2026-05-18T00:09:26.732336+00:00","updated_at":"2026-05-18T00:09:26.732336+00:00"}