Nektar++ and hydrodynamic stability in undulated channels

Nektar++ has been used to study various forms of hydrodynamic instabilities arising is a flow through a channel with corrugated walls. Stability analysis has been performed using direct numerical simulation and tracking growth, or attenuation of the unstable modes.

Dispersion/diffusion analysis and LES
Nektar++ has been recently used to verify the dispersion/diffusion estimates of discontinuous spectral element methods for non-periodic flow problems. This work a key implications on the effective construction of LES tools for industrial problems.

Nektar++ on the UCL Thomas cluster
Brief description of and Nektar++ installation instructions for Thomas, the UK National Tier 2 High Performance Computing Hub in Materials and Molecular Modelling.

Nektar++ strong scaling performance on Mira
We have recently performed some tests of the Nektar++ incompressible Navier-Stokes solver on a Formula 1 car geometry. The tests were run on Mira up to 131k cores and show excellent scaling of of the code for massively parallel simulations.

Nektar++ has been used to investigate the incompressible flow around wings with spanwise waviness, using direct numerical simulations at different Reynolds numbers. The waviness was imposed by a coordinate transformation, using a novel technique presented in our JCP paper (1). This global mapping allowed us to consider a 2.5D problem, leading to significant advantages in terms […]

Nektar++ Workshop 2017
The Nektar++ Workshop 2017 will be held at Imperial College on 14th-15th June 2017. The 3rd annual Nektar++ Workshop will bring together developers and users of all experiences to hear about new and future developments in Nektar++ and the exciting science and engineering being undertaken with the code.

Nektar++ v4.4.0 released
The latest version of Nektar++, v4.4.0, was released on the 9th March 2017. It can be downloaded from the downloads page.

Understanding the fluid mechanics behind transverse wall shear stress
DOI: 10.1016/j.jbiomech.2016.11.035
Abstract: Here we use numerical methods to investigate the nature of the arterial flows captured by transWSS and the sensitivity of transWSS to inflow waveform and aortic geometry.

Contributing to Nektar++
We encourage people who extend the code to help with their research to contribute those changes back into the main codebase for the benefit of other researchers. We have a number of tools and processes to help this including a code repository, a testing framework, code review and a continuous integration system.