Pith Number

pith:KEP7SAAY

pith:2026:KEP7SAAYR442PWEAJDI64WX4CT

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Experimental study of turbulent thermal diffusion of inertial particles in a convective turbulence forced by oscillating grids

A. Levy, E. Elmakies, I. Rogachevskii, N. Kleeorin, O. Shildkrot

Inertial particles form larger clusters near the mean temperature minimum than smaller particles because turbulent thermal diffusion produces a stronger effective drift velocity for them.

arxiv:2602.22008 v3 · 2026-02-25 · physics.flu-dyn · physics.ao-ph

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\pithnumber{KEP7SAAYR442PWEAJDI64WX4CT}

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Claims

C1strongest claim

Measurements of temperature and particle number density spatial distributions have demonstrated the formation of large-scale clusters of inertial particles in the vicinity of the mean temperature minimum due to turbulent thermal diffusion. In the experiments, the effective drift velocity caused by turbulent thermal diffusion that results in the formation of large-scale clusters of inertial particles (having the diameter 10 μm) is in 1.5 -- 2.5 times larger than that for noninertial particles (having the diameter 0.7 μm) depending on the level of turbulence.

C2weakest assumption

That the observed particle clustering and measured drift velocities are caused exclusively by turbulent thermal diffusion rather than confounding factors such as gravitational settling, wall effects, or non-uniform grid forcing in the convective setup.

C3one line summary

Experiments show that 10-micron inertial particles experience 1.5-2.5 times stronger effective drift velocity from turbulent thermal diffusion than 0.7-micron noninertial particles, leading to larger clusters near mean temperature minima.

Formal links

2 machine-checked theorem links

Cited by

3 papers in Pith

Turbophoresis of inertial particles in inhomogeneous turbulence produced by oscillating grids

Receipt and verification

First computed	2026-05-26T02:04:07.155400Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

511ff900188f39a7d88048d1ee5afc14da0b4a196339f4c9f1acb7988fc597af

Aliases

arxiv: 2602.22008 · arxiv_version: 2602.22008v3 · doi: 10.48550/arxiv.2602.22008 · pith_short_12: KEP7SAAYR442 · pith_short_16: KEP7SAAYR442PWEA · pith_short_8: KEP7SAAY

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/KEP7SAAYR442PWEAJDI64WX4CT \
  | 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: 511ff900188f39a7d88048d1ee5afc14da0b4a196339f4c9f1acb7988fc597af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3adbaefdedb32c6e344d61995a054d6278fd095dfc4dc05d2fab92f2686c6b4b",
    "cross_cats_sorted": [
      "physics.ao-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2026-02-25T15:23:24Z",
    "title_canon_sha256": "f4163a628e273f37b6c224aa4a4547d578a00c2e589eb8370adc5deedf8c6da6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.22008",
    "kind": "arxiv",
    "version": 3
  }
}