Dear Colleagues,

With the urgent demand for global clean energy, geothermal resources have gradually received increasing attention, and the development efforts in this direction have gradually increased. Geothermal energy is a green, low-carbon, recyclable renewable energy with the characteristics of large reserves, wide distribution, clean and environmentally friendly properties, stability and reliability. The development and utilization of geothermal energy are of great significance to adjusting the energy structure, saving energy and reducing emissions, and improving the environment. For deep geothermal resource development projects, the key physical processes involve the fluid flow of deep fractured rock mass as well as heat and mass transfer. The convective heat transfer mechanism and main control factors between low-temperature heat exchange working fluid and high-temperature rock mass in reservoirs are the keys to geothermal development. Deep in situ rock mass is under three-dimensional high-stress and high-temperature conditions. The role of high-pressure water is involved in the geothermal development process, and its mechanical behavior and seepage heat transfer mechanism are extremely complex. Therefore, clarifying the high-temperature mechanical behavior of deep in situ rock mass and the coupling mechanism of seepage heat and mass transfer is the theoretical basis and prerequisite for realizing the safety and rational development of deep earth resources.

This Special Issue encourages submissions which will provide new insights into the development of deep geothermal energy, focusing on rock mechanics and heat/mass transfer behaviors in geothermal reservoirs. We actively encourage participation from researchers in the fields of deep resource exploration and evaluation, reservoir simulation technology, rock mechanics theory, and heat and mass transfer.

Dr. Jun Lu
Dr. Delei Shang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• mechanical behavior of deep high-temperature rock
• seepage heat transfer behavior and model of fracture rock
• geothermal development systems and theoretical technologies
• mass transfer characteristics of high-temperature fluids
• geothermal resources