| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
[콜로이드·계면화학] 콜로이드계면화학의 최신 연구동향 및 응용 |
| 제목 |
Structural change and rheology of a colloidal gel under shear startup |
| 초록 |
The anisotropy and rheology of colloidal gels under shear startup flow are discussed by Brownian dynamics simulations. Shear-induced structural changes are analyzed in both real and reciprocal space through computation of the pair distribution function and structure factor. A spherical harmonics expansion of pair distribution function is calculated to analyze structural anisotropy. In reciprocal space, structural anisotropy is quantified through an alignment factor, which shows overshoot behavior similar to the stresses. The evolution of the structural anisotropy is explained by the anisotropic rupture of the colloidal gel microstructure. The structural anisotropy during flow startup is quantitatively related to rheological behavior via a stress-small angle neutron scattering (SANS) rule that is modified to consider the influence of the rupture of the colloidal gel structure. |
| 저자 |
박준동 |
| 소속 |
금오공과대 |
| 키워드 |
Colloidal gel; Ansiotropy; Shear startup
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| E-Mail |
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