1) Research topics:

We focus on the experimental characterization, theoretical analysis, and numerical simulation of energy and mass transfer in porous media, includingflow in porous media (single-phase and multi-phase), phase transformation (transformation between gas, solid, liquid,supercritical...), interaction(mechanical, chemical, thermal, hydrological...)between porous media and pore constituents.

2) Unique features:

We explore multi-physics coupled behaviors of porous media under abnormal conditions such as low/high temperature, low/high pressure, and high stress. In-situ testing with the X-ray micro-CT technique and traditional testing methods would be used together to investigate the pore-scale mechanisms and reveal the underlying physics.

3) Targeted applications:

● Geoscience: coastal and marine energy and resources, permafrost ground, and extraterrestrial sediments.

●Geoengineering: exploitation of natural gas hydrate, and large-scale energy storage.

● Fundamental researches: multiphase flow and crystal growth in porous media, open-mode discontinuities in sediments, unsaturated soil mechanics, and dual porosity materials.

4) Featuring technology:

Dr. Lei has the experience of building a micro-CT scanner. He is familiar with X-ray related physics, reconstruction theory,3D image processing, and image-based numerical simulations.

The design and development of instruments are encouraged. Each laboratory member has the opportunity to build a unique testing assemblyon the way of exploring the unknown world.

Figure 1. Water-gas distribution in unsaturated sand(left)，

asand sample before and after loading in a triaxialtest(right).

Figure 2. Hydrate and ice lenses in fine-grained soil.

Figure 3. Methane hydrate in coarse-grained soil and its 3D visualization.

Figure 4. From 3D CT image to flow simulation.