Nanofluids are considered important fluids in the field of heat transfer, thermal management, and lubrication, among others. Therefore, this field has greatly developed in the last few years. Now, with advancing materials, the capabilities of these fluids are more enhanced in terms of hydrodynamics and thermal aspects.

With the advances in nanofluid science, there are ample opportunities for the adoption of nanofluids in various engineering applications such as thermal management, lubrication, energy harvesting, energy efficiency, etc. One of the major challenges for the adoption of nanofluids is the stability of such kinds of fluids, especially at higher temperatures. Different approaches have been proposed and adopted by researchers for various applications and temperature ranges to prepare stable nanofluids.

In this Special Issue, we keenly look into the preparation of nanofluids by hydrothermal synthesis which, due to the flexibility of wide temperature ranges, is attracting increasing attention. In addition, this Special Issue invites research on the important applications of nanofluids in various engineering sectors to facilitate future developments. Original research or review articles describing experimental, numerical or mathematical advances in this field are welcome.

Potential topics include but are not limited to the following:

• Thermo-physical properties enhancements
• Hybrid combinations of fluids with improved properties
• Thermal applications advancements
• Solar applications in photovoltaics and solar thermal
• Applications in desalination
• Heat sinks advancements
• Active systems for heat transfer
• Hydrodynamic advancements
• Stabilities advancements
• Aerodynamics advances by nanofluids
• Automobile applications of nanofluids
• Thermal conductivities enhancements
• Challenges in industrial adoption