A variational theory of lift

C Gonzalez, HE Taha - Journal of Fluid Mechanics, 2022 - cambridge.org
In this paper we revive a special, less-common, variational principle in analytical mechanics
(Hertz'principle of least curvature) to develop a novel variational analogue of Euler's …

Kinetic-energy instability of flows with slip boundary conditions

IG Gjerde, LR Scott - Journal of Mathematical Fluid Mechanics, 2022 - Springer
We utilize the notion of kinetic energy instability due to Reynolds and Orr to examine
instability of steady flow past a bluff body subject to slip boundary conditions with friction. We …

Leveraging code generation for transparent immersogeometric fluid–structure interaction analysis on deforming domains

GE Neighbor, H Zhao, M Saraeian, MC Hsu… - Engineering with …, 2023 - Springer
Code generation technology has been transformative to the field of numerical partial
differential equations (PDEs), allowing domain scientists and engineers to automatically …

Refining Kutta's flow over a flat plate: Necessary conditions for lift

HE Taha, C Gonzalez - AIAA Journal, 2023 - arc.aiaa.org
In this paper, we present a variational theory of lift that, unlike Kutta's theory, is derived from
first principles in mechanics: Hertz's principle of least curvature. In this theory, the unique …

Aero-structural optimization of shape memory alloy-based wing morphing via a class/shape transformation approach

PBC Leal, MA Savi, DJ Hartl - Proceedings of the Institution …, 2018 - journals.sagepub.com
Because of the continuous variability of the ambient environment, all aircraft would benefit
from an in situ optimized wing. This paper proposes a method for preliminary design of …

An embedded finite element framework for the resolution of strongly coupled fluid–structure interaction problems. Application to volumetric and membrane-like …

R Zorrilla, R Rossi, R Wüchner, E Oñate - Computer Methods in Applied …, 2020 - Elsevier
This work presents a Fluid–Structure Interaction framework for the robust and efficient
simulation of strongly coupled problems involving arbitrary large displacements and …

[HTML][HTML] Variational multiscale modeling with discretely divergence-free subscales

JA Evans, D Kamensky, Y Bazilevs - Computers & Mathematics with …, 2020 - Elsevier
We introduce a residual-based stabilized formulation for incompressible Navier–Stokes flow
that maintains discrete (and, for divergence-conforming methods, strong) mass conservation …

Elliptic partial differential equations from an elementary viewpoint

S Dipierro, E Valdinoci - arXiv preprint arXiv:2101.07941, 2021 - arxiv.org
These notes are the outcome of some courses taught to undergraduate and graduate
students from the University of Western Australia, the Pontif\'{\i} cia Universidade Cat\'olica …

Eight (y) mathematical questions on fluids and structures

D Bonheure, F Gazzola, G Sperone - Rendiconti Lincei, 2019 - ems.press
Turbulence is a long-standing mystery. We survey some of the existing (and sometimes
contradictory) results and suggest eight natural questions whose answers would increase …

A modified finite element formulation for the imposition of the slip boundary condition over embedded volumeless geometries

R Zorrilla, A Larese, R Rossi - Computer methods in applied mechanics …, 2019 - Elsevier
This work describes a novel formulation for the simulation of Navier–Stokes problems
including embedded objects. The new proposal is based on the use of a modified finite …