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LB Boundary force: fix unit conversion and tests #3287

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merged 2 commits into from
Oct 31, 2019

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RudolfWeeber
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Reference solutions for forces on shear planes and for stokes drag need dynamic viscosity, but LB uses kinetmatic viscosity.
This switches the tests to dynamic viscosity and removes a 1/rho from the unit conversion in the script interface.
Also, a force balance test is added, which does not depend on the density.

Fixes #

Description of changes:

PR Checklist

  • Tests?
    • Interface
    • Core
  • Docs?

Reference solutions for forces on shear planes and for stokes drag need dynamic viscosity, but LB uses kinetmatic viscosity.
This switches the tests to dynamic viscosity and removes a 1/rho from the unit conversion in the script interface.
Also, a force balance test is added, which does not depend on the density.
@RudolfWeeber RudolfWeeber added this to the Espresso 4.1.1 milestone Oct 31, 2019
@RudolfWeeber RudolfWeeber requested a review from fweik October 31, 2019 10:17
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codecov bot commented Oct 31, 2019

Codecov Report

Merging #3287 into python will decrease coverage by <1%.
The diff coverage is 100%.

Impacted file tree graph

@@          Coverage Diff           @@
##           python   #3287   +/-   ##
======================================
- Coverage      85%     85%   -1%     
======================================
  Files         534     534           
  Lines       25526   25524    -2     
======================================
- Hits        21950   21948    -2     
  Misses       3576    3576
Impacted Files Coverage Δ
src/script_interface/lbboundaries/LBBoundary.hpp 100% <100%> (ø) ⬆️

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testsuite/python/lb_shear.py Outdated Show resolved Hide resolved
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fweik commented Oct 31, 2019

bors r+

bors bot added a commit that referenced this pull request Oct 31, 2019
3287: LB Boundary force: fix unit conversion and tests r=fweik a=RudolfWeeber

Reference solutions for forces on shear planes and for stokes drag need dynamic viscosity, but LB uses kinetmatic viscosity.
This switches the tests to dynamic viscosity and removes a 1/rho from the unit conversion in the script interface.
Also, a force balance test is added, which does not depend on the density.

Fixes #

Description of changes:
 - 


PR Checklist
------------
 - [ ] Tests?
   - [ ] Interface
   - [ ] Core 
 - [ ] Docs?


Co-authored-by: Rudolf Weeber <weeber@icp.uni-stuttgart.de>
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bors bot commented Oct 31, 2019

Build succeeded

@bors bors bot merged commit 88730c8 into espressomd:python Oct 31, 2019
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2 participants