Pith Number

pith:M4WGFRHE

pith:2026:M4WGFRHE33ILFDFUURXEXS2W2P

not attested not anchored not stored refs resolved

A multifluid approach for polydisperse pebble accretion: From particles to fluids, establishing the multifluid framework

S.-J. Paardekooper, T. J. Konijn

A multifluid framework simulates polydisperse pebble accretion and shows gas perturbations lower the rates.

arxiv:2604.25742 v1 · 2026-04-28 · astro-ph.EP

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Claims

C1strongest claim

We have constructed a multifluid model framework capable of accurately simulating polydisperse pebble accretion consistent with previous studies. This framework has advantages for simulating higher planet masses, as well as modelling multiple pebble species which are coupled to the gas. We find the perturbation of the protoplanet on the gas-disc lowering accretion rate when assuming a MRN-distribution of solids.

C2weakest assumption

That a modest number of discrete pebble fluid species with chosen Stokes numbers in [10^{-2}, 10^0] faithfully represents the continuous underlying size distribution without introducing significant numerical bias in accretion rates or gas-solid coupling.

C3one line summary

A multifluid model for polydisperse pebble accretion validates against static-disc studies and finds gas perturbations lower efficiency for high-Stokes-number pebbles while raising it for low-St ones, with rates dominated by the largest pebbles and a higher polydisperse-to-monodisperse ratio than in

References

4 extracted · 4 resolved · 0 Pith anchors

[1] K., & Jurua, E 2022

[2] A.1 as an example for these calculated streamlines 2023

[3] We just take the size densityσ(St) defined in Eq 2018

[4] term from Eq. B.6 we find: ˙Mpoly ˙Mmono = 1/2 St1/2 max −St 1/2 min 1 St2/3 max Z Stmax Stmin St1/6dSt, = 3 7 St7/6 max −St 7/6 min St1/2 max −St 1/2 min 1 St2/3 max .(B.7) Which for St min =0 is exa 2023

Receipt and verification

First computed	2026-06-10T14:10:51.183246Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

672c62c4e4ded0b28cb4a46e4bcb56d3ca9453f21319426f7e1c804627bf4789

Aliases

arxiv: 2604.25742 · arxiv_version: 2604.25742v1 · doi: 10.48550/arxiv.2604.25742 · pith_short_12: M4WGFRHE33IL · pith_short_16: M4WGFRHE33ILFDFU · pith_short_8: M4WGFRHE

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/M4WGFRHE33ILFDFUURXEXS2W2P \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 672c62c4e4ded0b28cb4a46e4bcb56d3ca9453f21319426f7e1c804627bf4789

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c53d8bec78822376fbf18a83aa021aae64dda680483061990e5ad49f24fc17b8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-04-28T15:07:28Z",
    "title_canon_sha256": "49f1f38f51f3f1ecbce1aa5d283c259e26300f517d584b5a0dafadb458596884"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.25742",
    "kind": "arxiv",
    "version": 1
  }
}