TY - JOUR
T1 - Depinning and dynamics of imbibition fronts in paper under increasing ambient humidity
AU - Balankin, Alexander S.
AU - Zapata López, H.
AU - Pineda León, E.
AU - Morales Matamoros, D.
AU - Morales Ruiz, L.
AU - Silva López, Dan
AU - Rodríguez, M. A.
PY - 2013/1/15
Y1 - 2013/1/15
N2 - We study the effects of ambient air humidity on the dynamics of imbibition in a paper. We observed that a quick increase of ambient air humidity leads to depinning and non-Washburn motion of wetting fronts. Specifically, we found that after depinning the wetting front moves with decreasing velocity vâ̂(hp/hD )γ, where hD is the front elevation with respect to its pinned position at lower humidity hp, while γ≅1/3. The spatiotemporal maps of depinned front activity are established. The front motion is controlled by the dynamics of local avalanches directed at 30 to the balk flow direction. Although the roughness of the pinned wetting front is self-affine and the avalanche size distribution displays a power-law asymptotic, the roughness of the moving front becomes multiaffine a few minutes after depinning.
AB - We study the effects of ambient air humidity on the dynamics of imbibition in a paper. We observed that a quick increase of ambient air humidity leads to depinning and non-Washburn motion of wetting fronts. Specifically, we found that after depinning the wetting front moves with decreasing velocity vâ̂(hp/hD )γ, where hD is the front elevation with respect to its pinned position at lower humidity hp, while γ≅1/3. The spatiotemporal maps of depinned front activity are established. The front motion is controlled by the dynamics of local avalanches directed at 30 to the balk flow direction. Although the roughness of the pinned wetting front is self-affine and the avalanche size distribution displays a power-law asymptotic, the roughness of the moving front becomes multiaffine a few minutes after depinning.
UR - http://www.scopus.com/inward/record.url?scp=84872537269&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.87.014102
DO - 10.1103/PhysRevE.87.014102
M3 - Artículo
C2 - 23410468
SN - 1539-3755
VL - 87
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 1
M1 - 014102
ER -