On the Rosensweig instability of ferrofluid-infused surfaces under a uniform magnetic field

被引：3

作者：

Khan, Adnan ^{[1
,2
,3
,4
]}

Yamaguchi, Hiroshi ^{[1
,2
,3
,4
]}

机构：

[1] Shantou Univ, Key Lab Intelligent Mfg Technol, MOE, 243 Daxue Rd, Shantou 515063, Guangdong, Peoples R China

[2] Shantou Univ, Coll Engn, 243 Daxue Rd, Shantou 515063, Guangdong, Peoples R China

[3] Tsinghua Univ, Dept Mech Engn, Beijing, Peoples R China

[4] Doshisha Univ, Energy Convers Res Ctr, Kyoto 6300321, Japan

来源：

PHYSICS OF FLUIDS | 2023年 / 35卷 / 11期

关键词：

Compendex;

D O I：

10.1063/5.0173602

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This study numerically examines the Rosensweig instability of a ferrofluid-infused surface (FIS), which is an overlayer surface formed on the top of a porous substrate into which the ferrofluid is infused. FIS inherits the lubricating property of liquid-infused surfaces and the magnetic property of the ferrofluid, allowing an external control by a magnetic field. Currently, the evolution mechanisms of the Rosensweig instability of the FIS remain unclear. By using the recently developed coupled numerical scheme, which consists of the simplified multiphase lattice Boltzmann method and the self-correcting method for the Maxwell magnetic field equations, the intriguing mechanism and evolution dynamics of the ferrofluid spikes on the FIS are investigated systematically by examining the effects of overlayer thickness, substrate pore size, and magnetic field strength. The results are also analyzed by the Rosensweig instability theory. This study provides a theoretical and numerical basis for the magnetic field control of droplet or bubble motions on the FIS.

引用

页数：17