To model the void texture of porous concrete, the multi-layered micro-perforated rigid panel model considering air gaps [1,2] is adopted.
The diffuse-interface models, also called the phase field models, consider the void surface to be diffuse, i.e., has a finite width, in order to circumvent the numerical difficulties associated with solving the moving boundary problem of evolving voids (El-Azab et al., 2014; Hochrainer & El-Azab, 2015).
The calibrated micromechanics-based fracture criteria, including the Stress Modified Critical Strain (SMCS) model and the Void Growth Model (VGM), were used to predict fracture initiation for each specimen.
This paper presents experimental results of the average void fraction and new models for the void fraction in a horizontal helically coiled rectangular channel.
The pore-scale models classify the void space into pores, or pore bodies, and pore throats, and then investigate the interactions between the pores.
Newer, creative models filled the void.
After EM testing for 650 h, a new EM failure mechanism was found, differing from the two well-known models, the pancake void propagation and the under-bump-metallization dissolution.
The model with the void space demonstrated characteristics which resembles a sensible heat storage system rather than the constant temperature characteristics of a latent heat storage system.
To achieve this, CFD simulations were carried out using the Volume of Fluid (VOF) model, where the void fraction and head was obtained.
In the pore-network modeling approach, the void space of a rock is described as a network of pores connected by the throats.
