Mathematical Models and Numerical Solutions of Liquid-Solid and Solid-Liquid Phase Change

Formation of liquid and solid products from liquid phase pyrolysis.

The aim of the present work was to improve the C:O ratio in biomass by preserving the lignin macrostructure of lignocellulosic feed. The intention of liquid phase pyrolysis is to liquefy biomass and prepare biomass for further upgrading steps like hydrogenation and deoxygenation. Pyrolysis was carried out in a non-aqueous liquid phase heat carrier. The process was carried out in a semi-batch re...

Analysis of Solid-Liquid Phase Change under Pulsed Heating

Numerical Simulation of Coupled Liquid-solid Dynamics

Under micro-gravity conditions, fluid behaviour is — at least from a computational point of view — more complicated than under terrestrial conditions. Since capillary forces at the free surface dominate the flow, the location and shape of the free surface have to be computed accurately. Moreover, in an extra-terrestrial environment, fluid has the tendency to undergo large topological changes re...

Natural convection solid/liquid phase change in porous media

A combined numerical and experimental study is reported of solid/liquid phase change in porous media with natural convection in the melt region. The model is based on volume averaged transport equations, while phase change is assumed to occur over a small temperature range. Experiments are performed in a vertical, square enclosure using gallium and glass beads as the fluid and the porous matrix...

Solid-liquid separation after liquid-liquid extraction.

A low-melting solid is used as organic solvent for liquid-liquid extraction at elevated temperatures followed by solidification and decantation of the aqueous phase.