6 papers
A Modified Moving Reference Frame Method for Propeller Resolution
Denis Andreev, Georgios Bletsos, Antonios Kritikos +2
Accurate resolution of propeller-hull interaction is essential for predicting the self-propulsion point in ship CFD, yet motion-resolving methods such as sliding interfaces (SI) ar…
Adjoint Sensitivity Maps for Passive Flow Control Around Rotating Circular Cylinders Across a Wide Operating Envelope
Niklas Kühl
Rotating circular cylinders are employed in a variety of engineering applications, one prominent example being Flettner rotors for wind-assisted ship propulsion. Besides optimizing…
On the Removal of Solver-Induced Dependencies in Momentum-Weighted Interpolation for Primal and Continuous-Adjoint Flow Solvers
Niklas Kühl
Momentum-Weighted Interpolation (MWI) is a key component in pressure--velocity coupling schemes on collocated cell-centered finite-volume methods for both primal and continuous adj…
Incremental Model Order Reduction of Smoothed-Particle Hydrodynamic Simulations
Eduardo Di Costanzo, Niklas Kühl, Jean-Christophe Marongiu +1
Engineering simulations are usually based on complex, grid-based, or mesh-free methods for solving partial differential equations. The results of these methods cover large fields o…
Differential Equation Based Wall Distance Approaches for Maritime Engineering Flows
Niklas Kühl
The paper is concerned with modeling and simulating approaches of wall distance functions based on Partial Differential Equations (PDE). The distance to the nearest wall is require…
Elliptic Relaxation Strategies to Support Numerical Stability of Segregated Continuous Adjoint Flow Solvers
Niklas Kühl
This paper introduces a novel method for numerically stabilizing sequential continuous adjoint flow solvers utilizing an elliptic relaxation strategy. The proposed approach is form…