Is the Immersed Boundary (IB) method considered a Direct Numerical Simulation?
A DNS code is the most detailed type of simulation and the most accurate but computationally expensive, right?
What makes a simulation not a DNS?
Computational Science Stack Exchange is a question and answer site for scientists using computers to solve scientific problems. It only takes a minute to sign up.Sign up to join this community
The term immersed boundary method has nothing to do with the term direct numerical simulation.
The immersed boundary method is a numerical methodology that is often used to handle heterogeneous fluid regions in your simulation domain.
The term direct numerical simulation is often used in the LES community where the underlying equation system, e.g. Navier-Stokes, is numerically solved without any turbulence model. This means that the whole range of spatial and temporal scales of the turbulence must be resolved. The term can also be understood more generally as a highly resolved numerical simulation of a given PDE without additional modelling where all relevant physical effects are sufficiently accurately resolved.