This volume presents state-of-the-art developments in theoretical and applied fluid mechanics. Chapters are based on lectures given at a workshop in the summer school Fluids under Control, held in Prague on August 25, 2021. Readers will find a thorough analysis of current research topics, presented by leading experts in their respective fields. Specific topics covered include:

• Magnetohydrodynamic systems
• The steady Navier-Stokes-Fourier system
• Boussinesq equations
• Fluid-structure-acoustic interactions

Fluids under Control will be a valuable resource for students interested in mathematical fluid mechanics.