Thermohydraulische
Thermohydraulics, often referred to as thermohydraulik in German, is the discipline that studies the coupled transport of heat and momentum in fluids. It addresses how temperature fields interact with fluid flow, influencing heat transfer, pressure drops, and flow stability in liquids and gases. The core problem is governed by the Navier–Stokes equations for momentum, the continuity equation, and the energy equation, with material properties such as density, viscosity, and thermal conductivity potentially varying with temperature. Dimensionless groups such as Reynolds, Prandtl, Nusselt, and Grashof numbers help characterize the relative effects of inertia, viscous forces, heat conduction, and buoyancy.
Phenomena in thermohydraulics include naturally occurring buoyancy-driven flows (natural convection) and forced flows, two-phase phenomena including
Modeling and methods in thermohydraulics combine analytical approaches for simple geometries with numerical techniques such as
Applications of thermohydraulics span power generation and nuclear engineering, where reactor cooling and safety margins are