Skip to content
GitLab
Projects Groups Topics Snippets
  • /
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
    • Contribute to GitLab
  • Sign in
  • T TurTLE
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributor statistics
    • Graph
    • Compare revisions
  • Issues 4
    • Issues 4
    • List
    • Boards
    • Service Desk
    • Milestones
  • Merge requests 0
    • Merge requests 0
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
  • Deployments
    • Deployments
    • Environments
    • Releases
  • Packages and registries
    • Packages and registries
    • Container Registry
  • Monitor
    • Monitor
    • Incidents
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Repository
  • Wiki
    • Wiki
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • TurTLE
  • TurTLE
  • Issues
  • #37
Closed
Open
Issue created Sep 01, 2020 by Cristian Lalescu@chichiOwner

dealiasing and pressure Hessian

TurTLE allows for two dealiasing methods now (2/3 and smooth dealiasing). We need to also implement 1/2 dealiasing. Opening issue for easier tracking of development.

See below document prepared by @mcarbone :

test_dealiasing.pdf

There are two points laid out in the above document:

  1. We may test the new dealiasing method by simply computing spectra of dealiased fields and comparing spectrum for 2/3 with spectrum for 1/2. There are analytic expressions for wavenumbers where spectra go to 0.

  2. Pressure Hessian and squared velocity gradients satisfy known equations that fail when using 2/3 dealiasing, but work for 1/2.

Therefore I see the following steps for the work:

  • Implement 1/2 dealiasing (i.e. new template for kspace).
  • Write new TurTLE test that generates spectra comparisons for different dealiasing methods, i.e. point 1 from above.
  • Write post-processing tool that computes the pressure Hessian and the velocity gradient, and verifies the equations detailed in 2.

Afterwards we see exactly what type of postprocessing tool we write for future data analysis.

Assignee
Assign to
Time tracking