### Abstract

We study universal critical adsorption on a solid sphere and a solid cylinder in a fluid at bulk criticality, where preferential adsorption occurs. We use a local functional theory proposed by Fisher et al. [M. E. Fisher and P. G. de Gennes, C. R. Acad. Sci. Paris Ser. B 287, 207 (1978); M. E. Fisher and H. Au-Yang, Physica A 101, 255 (1980)PHYADX0378-437110.1016/0378-4371(80)90112-0]. We calculate the mean order parameter profile ψ(r), where r is the distance from the sphere center and the cylinder axis, respectively. The resultant differential equation for ψ(r) is solved exactly around a sphere and numerically around a cylinder. A strong adsorption regime is realized except for very small surface field h1, where the surface order parameter ψ(a) is determined by h1 and is independent of the radius a. If r considerably exceeds a, ψ(r) decays as r-(1+η) for a sphere and r-(1+η)/2 for a cylinder in three dimensions, where η is the critical exponent in the order parameter correlation at bulk criticality.

Original language | English |
---|---|

Article number | 032127 |

Journal | Physical Review E |

Volume | 96 |

Issue number | 3 |

DOIs | |

Publication status | Published - Sep 18 2017 |

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### All Science Journal Classification (ASJC) codes

- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics

### Cite this

**Critical adsorption profiles around a sphere and a cylinder in a fluid at criticality : Local functional theory.** / Yabunaka, Shunsuke; Onuki, Akira.

Research output: Contribution to journal › Article

*Physical Review E*, vol. 96, no. 3, 032127. https://doi.org/10.1103/PhysRevE.96.032127

}

TY - JOUR

T1 - Critical adsorption profiles around a sphere and a cylinder in a fluid at criticality

T2 - Local functional theory

AU - Yabunaka, Shunsuke

AU - Onuki, Akira

PY - 2017/9/18

Y1 - 2017/9/18

N2 - We study universal critical adsorption on a solid sphere and a solid cylinder in a fluid at bulk criticality, where preferential adsorption occurs. We use a local functional theory proposed by Fisher et al. [M. E. Fisher and P. G. de Gennes, C. R. Acad. Sci. Paris Ser. B 287, 207 (1978); M. E. Fisher and H. Au-Yang, Physica A 101, 255 (1980)PHYADX0378-437110.1016/0378-4371(80)90112-0]. We calculate the mean order parameter profile ψ(r), where r is the distance from the sphere center and the cylinder axis, respectively. The resultant differential equation for ψ(r) is solved exactly around a sphere and numerically around a cylinder. A strong adsorption regime is realized except for very small surface field h1, where the surface order parameter ψ(a) is determined by h1 and is independent of the radius a. If r considerably exceeds a, ψ(r) decays as r-(1+η) for a sphere and r-(1+η)/2 for a cylinder in three dimensions, where η is the critical exponent in the order parameter correlation at bulk criticality.

AB - We study universal critical adsorption on a solid sphere and a solid cylinder in a fluid at bulk criticality, where preferential adsorption occurs. We use a local functional theory proposed by Fisher et al. [M. E. Fisher and P. G. de Gennes, C. R. Acad. Sci. Paris Ser. B 287, 207 (1978); M. E. Fisher and H. Au-Yang, Physica A 101, 255 (1980)PHYADX0378-437110.1016/0378-4371(80)90112-0]. We calculate the mean order parameter profile ψ(r), where r is the distance from the sphere center and the cylinder axis, respectively. The resultant differential equation for ψ(r) is solved exactly around a sphere and numerically around a cylinder. A strong adsorption regime is realized except for very small surface field h1, where the surface order parameter ψ(a) is determined by h1 and is independent of the radius a. If r considerably exceeds a, ψ(r) decays as r-(1+η) for a sphere and r-(1+η)/2 for a cylinder in three dimensions, where η is the critical exponent in the order parameter correlation at bulk criticality.

UR - http://www.scopus.com/inward/record.url?scp=85029843547&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85029843547&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.96.032127

DO - 10.1103/PhysRevE.96.032127

M3 - Article

AN - SCOPUS:85029843547

VL - 96

JO - Physical Review E

JF - Physical Review E

SN - 2470-0045

IS - 3

M1 - 032127

ER -