Pith Number

pith:DFWXUO24

pith:2026:DFWXUO244RGXEJ7JGA3B6WMVJV

not attested not anchored not stored refs resolved

Diffusiophoretic dispersion of a colloidal blob in porous media

Aditya R. Pujari, Amir A. Pahlavan

Diffusiophoresis reverses the expected effect of attraction and repulsion on colloid dispersion in porous media.

arxiv:2605.04424 v1 · 2026-05-06 · cond-mat.soft · physics.flu-dyn · physics.geo-ph

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\pithnumber{DFWXUO244RGXEJ7JGA3B6WMVJV}

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Claims

C1strongest claim

Instead, we observe the opposite trend: longitudinal dispersion is enhanced in the attractive case, whereas dispersion is suppressed in the repulsive case.

C2weakest assumption

That the observed reversal is caused by diffusiophoretic particle exchange between slow and fast streamlines as captured by the minimal two-layer plug-flow model, rather than other unmodeled effects such as pore-scale hydrodynamics or experimental artifacts.

C3one line summary

Diffusiophoresis reverses expected colloidal dispersion in porous media by enhancing spreading for attractive cases and suppressing it for repulsive cases via exchange between slow and fast streamlines.

References

155 extracted · 155 resolved · 1 Pith anchors

[1] , Shim, Suin , Mintah, Emmanuel , Gupta, Ankur & Stone, Howard A 2021

[2] 2026 Diffusiophoretic transport of colloids in porous media 2026

[3] Annual review of fluid mechanics 21 (1), 61--99 1989

[4] & Shin, Sangwoo 2025 Physicochemical hydrodynamics of particle diffusiophoresis driven by chemical gradients 2025

[5] Journal of Fluid Mechanics 854 , 420--448 2018

Receipt and verification

First computed	2026-05-27T02:05:21.078858Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

196d7a3b5ce44d7227e930361f59954d595f0ac392e4e231bd59ddf5c7c9b4d6

Aliases

arxiv: 2605.04424 · arxiv_version: 2605.04424v1 · doi: 10.48550/arxiv.2605.04424 · pith_short_12: DFWXUO244RGX · pith_short_16: DFWXUO244RGXEJ7J · pith_short_8: DFWXUO24

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/DFWXUO244RGXEJ7JGA3B6WMVJV \
  | 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: 196d7a3b5ce44d7227e930361f59954d595f0ac392e4e231bd59ddf5c7c9b4d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e56ffb882db00f10f9569e30d4b9d41ede970779cab64ee69935fba1755e3cc",
    "cross_cats_sorted": [
      "physics.flu-dyn",
      "physics.geo-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2026-05-06T02:38:10Z",
    "title_canon_sha256": "7e2b7c67f82741162da28ae0ed5ffbb709e665c8b692b994e9efe7bf85ef3d1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.04424",
    "kind": "arxiv",
    "version": 1
  }
}