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Concave particle pressure validation #61

Merged
merged 14 commits into from
Sep 15, 2023
Merged

Concave particle pressure validation #61

merged 14 commits into from
Sep 15, 2023

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tcmoore3
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Description

Performs cross validation using NVT and NPT simulations of a hard particle with a concave shape. Computes the pressure in NVT simulations, and then runs NPT simulations and calculates the density the mean pressure.

Motivation and context

Validates the implementation of the SDF-based pressure calculation where the expansive contribution to the pressure is nonzero (i.e., for non-convex hard particles).

Resolves #43

How has this been tested?

Ran on PSC-Bridges2. Results:
image

Checklist:

@tcmoore3 tcmoore3 requested review from a team, SchoeniPhlippsn and joaander and removed request for a team and SchoeniPhlippsn August 21, 2023 19:56
@tcmoore3
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pre-commit.ci autofix

@tcmoore3
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pre-commit.ci autofix

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@joaander joaander left a comment

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Thanks! Please post the analysis results including the nvt_gpu jobs (run on Great Lakes or Delta).


subprojects = [alj_2d, lj_fluid, lj_union, hard_disk, hard_sphere]
subprojects = [
alj_2d, lj_fluid, lj_union, hard_disk, hard_sphere, simple_polygon
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Suggested change
alj_2d, lj_fluid, lj_union, hard_disk, hard_sphere, simple_polygon
alj_2d, lj_fluid, lj_union, hard_disk, hard_sphere, simple_polygon,

And run pre-commit to format one item per line.

# Copyright (c) 2022-2023 The Regents of the University of Michigan.
# Part of HOOMD-blue, released under the BSD 3-Clause License.

"""Hard disk equation of state validation test."""
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Suggested change
"""Hard disk equation of state validation test."""
"""Simple polygon equation of state validation test."""

Comment on lines 43 to 47
# reference statepoint from: http://dx.doi.org/10.1016/j.jcp.2013.07.023
# Assume the same pressure for a 128**2 system as this is in the fluid
# from first test: mean +- std_err_means =
# 6.205344838518146 +- 0.0011239315686705335
# based on nvt sims at density = 0.75 over 32 replicas
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Not all of these comment lines can be true at the same time. Remove the invalid ones.

RANDOMIZE_STEPS = 20_000
EQUILIBRATE_STEPS = 100_000
RUN_STEPS = 2_500_000
RESTART_STEPS = RUN_STEPS // 10
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Suggested change
RESTART_STEPS = RUN_STEPS // 10
RESTART_STEPS = RUN_STEPS // 50

Shorten the restart period from ~30 minutes down to ~6 (tested on cheme-hodges).

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Here are the results from the GPU jobs run on Delta.
image

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@joaander joaander left a comment

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Looks good! Thanks!

@joaander joaander merged commit 955b7a1 into trunk Sep 15, 2023
1 check passed
@joaander joaander deleted the expansive-sdf branch September 15, 2023 17:11
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Validate expansive SDF.
2 participants