International audienceTidal dissipation in stars and planets intrinsically depends on the nature of their tidal response, which is directly linked to their internal structure and rheology. Indeed, solids and fluids do not behave in the same way, the response of the second being highly resonant. This study, focused on viscous friction acting on tidal waves, uses a local model to provide scaling laws allowing to better understand the physics of dissipation in the fluid regions of celestial bodies. It shows how the nature and properties of low-frequency tidal gravito-inertial waves change with fluid parameters such as viscosity, thermal diffusivity, rotation and stratification. Besides, the scaling laws derived from the local model are applied...