Magnetic fluids are stable colloidal suspensions of ferromagnetic nano-particles (of size 10-20 nm) in a nonmagnetic liquid carrier. An initially uniform particle distribution in the carrier becomes spatially inhomogeneous in nonuniform magnetic fields. Motion of particles in magnetic fluids under the action of magnetic fields is of particular interest for contemporary mathematical and numerica...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Mikael Mohtaschemi Name of the doctoral dissertation Spatially resolved rheology modeling of complex fluids Publisher School of Science Unit Department of Applied Physics Series Aalto University publication series DOCTORAL DISSERTATIONS 152/2015 Field of research Theoretical and Computational Physics Manuscript submitted 15 Ju...

In the course of a survey of the effect of injection of extracts and suspensions of normal tissues upon body temperature in rabbits (1), it was found that the intravenous inoculation of suspensions of whole polymorphonuclear leukocytes, extracts from these cells, or supernatant fluids obtained from sterile peritoneal exudates containing granulocytes produced febrile responses in normal rabbits....

Stable drop jettability is mandatory for a successful, technical scale inkjet printing, and accordingly, this aspect has attracted much attention in fundamental and applied research. Previous studies were mainly focused on Newtonian fluids or polymer solutions. Here, we have investigated the drop jetting for zinc oxide (ZnO) particulate suspensions. Generally, the inverse Ohnesorge number Z = O...

It is known that macroscopic properties of colloidal suspensions are often determined by the microstructure of the particles in the suspensions, depending on the interparticle, Brownian, and hydrodynamic (if any) forces. We take electrorheological (ER) fluids as an example. By using a computer simulation and an experimental approach, we investigate the structure of ER fluids subjected to both a...

The viscosity of polydispersed graphene nanosheet (5 nm–1.5 lm) suspensions (GNS) and its behavior with temperature and concentration have been experimentally determined. A physical mechanism for the enhanced viscosity over the base fluids has been proposed for the polydispersed GNSs. Experimental data reveal that enhancement of viscosity for GNSs lies in between those of carbon nanotube suspen...

The Phadebact and Bactigen reagents were evaluated for detection of Neisseria meningitidis in cerebrospinal fluids. The Bactigen test yielded stronger agglutination reactions from clinical specimens and was significantly more sensitive when used with whole-cell suspensions and purified antigens.

Fluids of molecules or particles interacting through dipole forces describe polar liquids and colloidal suspensions such as ferroQuids and electrorheological fluids. Phase diagrams for systems with strong dipolar coupling are not precisely known. Possible liquid state phase transitions include phase separation and spontaneous polarization. We present a set of generic phase diagrams for the Huid...