1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

Surface and Colloid Science

1. The real variable 2. Scalars and vectors 3. Tensors 4. Matrices 5. Multiple integrals 6. Potential theory 7. Operational methods 8. Physical applications of the operational method 9. Numerical methods 10. Calculus of variations 11. Functions of a complex variable 12. Contour integration and Bromwich's integral 13. Contour integration 14. Fourier's theorem 15. The factorial and related functions 16. Solution of linear differential equations of the second order 17. Asymptotic expansions 18. The equations of potential, waves and heat conduction 19. Waves in one dimension and waves with spherical symmetry 20. Conduction of heat in one and three dimensions 21. Bessel functions 22. Applications of Bessel functions 23. The confluent hypergeometric function 24. Legendre functions and associated functions 25. Elliptic functions Notes Appendix on notation Index.

Methods of Mathematical Physics. By Harold Jeffreys and Bertha Swirles Jeffreys. Pp. viii, 679. 63s. 1946. (Cambridge University Press)

This paper presents results of an experimental investigation of a single drop impact onto a dry, partially wettable substrate and its numerical simulation Particularly, the drop spreading diameter and the dynamic contact angle are measured at different time instants after impact Two surfaces, wax (low wettability) and glass (high wettability), are used to study the effect of surface wettability (static contact angle) on the impact dynamics It is shown that existing empirical models for the dynamic contact angle (eg, Hoffman–Voinov–Tanner law) do not predict well the change of the dynamic contact angle, especially at high capillary numbers In addition to the experimental investigations, the drop impact was studied numerically, focusing primarily on the contact angle treatment The singularity in the neighborhood of the moving contact line is removed from the computational domain and replaced by a local force with some dependence on the instantaneous advancing/receding contact-line velocity The predicted time dependence of the drop spreading diameter and of the dynamic contact angle agrees well with the experimental data for both the advancing and receding phases of the impact process

Dynamic contact angle of spreading droplets: Experiments and simulations

We derive an analytic solution for the capillary rise of liquids in a cylindrical tube or a porous medium in terms of height h as a function of time t. The implicit t(h) solution by Washburn is the basis for these calculations and the Lambert W function is used for its mathematical rearrangement. The original equation is derived out of the 1D momentum conservation equation and features viscous and gravity terms. Thus our h(t) solution, as it includes the gravity term (hydrostatic pressure), enables the calculation of the liquid rise behavior for longer times than the classical Lucas-Washburn equation. Based on the new equation several parameters like the steady state time and the validity of the Lucas-Washburn equation are examined. The results are also discussed in dimensionless form.

https://www.zarm.uni-bremen.de/2forschung/grenzph/papers/analyticsolution2008.pdf

An analytic solution of capillary rise restrained by gravity.

Binder jet 3D printing—Process parameters, materials, properties, modeling, and challenges

Correlation for dynamic contact angle

Two techniques for measuring nonlinear interfacial stress-deformation behavior using rotational interfacial viscometers are proposed. Either a single bob can be used or two bobs of slightly different radii can be employed. A series of experiments with the interface between air and an aqueous solution of 0.1 wt% dodecyl sodium sulfate have been carried out using the disk, knife-edge, and thin biconical bob interfacial viscometers. Four sets of data have been analyzed using the single-bob technique. Data for two disks also have been analyzed by the double-bob technique. Agreement among the results supports the validity of the proposed methods. The same system has been studied in a deep-channel interfacial viscometer. For the first time, consistent measurements of interfacial stress-deformation behavior have been obtained from two different interfacial viscometers.

Nonlinear interfacial stress-deformation behavior measured with several interfacial viscometers

The local volume averages of the equations of motion as well as the appropriate boundary conditions are developed for a flowing suspension of non-neutrally buoyant, uniform spheres in an incompressible Newtonian fluid under conditions such that inertial effects can be neglected. These equations do not represent an asymptotic theory with respect to the volume fraction of solids. Higher order terms have been retained everywhere, except where it has been necessary to estimate the velocity distribution within the immediate neighborhood of each sphere by neglecting the effects of the other spheres present. The resulting local volume-averaged equations of motion and boundary conditions involve no free or undetermined parameters. For the special case of a very dilute suspension of neutrally buoyant spheres, the total local volume average of Cauchy's first law reduces to the form of the Navier-Stokes equation with the effective viscosity computed by Einstein (1906, 1956). In two succeeding papers, we demonstrate ...

The local volume-averaged equations of motion for a suspension of non-neutrally buoyant spheres

The theory developed by Jiang et al. (1987) for a flowing suspension of neutrally buoyant spheres in an incompressible Newtonian fluid is further tested for a limiting case of the Couette viscometer, for a limiting case of the cone-plate viscometer, and for the parallel-plate viscometer. Compared with the available data for the Couette viscometer, the average errors are less than 2.6% for y < 0.10, 4.2% for y < 0.15, and 5.5% for y < 0.20. The predictions of its limiting case for very dilute suspensions are capable of representing these data with errors less than 4% for y < 0.08.

Tsung-Shann Jiang

Papers

Correlation for dynamic contact angle

Nonlinear interfacial stress-deformation behavior measured with several interfacial viscometers

The local volume-averaged equations of motion for a suspension of non-neutrally buoyant spheres

Flows of neutrally buoyant suspensions in several viscometers