R Observatory: Metrics for chapensk version 0.5

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

chapensk

0.5

Estimation of Gas Properties from the Lennard-Jones Potential

0packages depend

2.1Kdownloads / year

74.3%test coverage

13/13checks pass

Overview

About

Maintained by Stefan LangenbergFirst published 2025-07-292 releasesCRAN page ↗GitHub ↗

Calculation of gas transport properties (viscosity, diffusion, thermal conductivity) using Chapman-Enskok theory (Chapman 1918, doi:10.1098/rsta.1918.0005) and of the second virial coefficient (Vargas et al. 2001, doi:10.1016/s0378-4371(00)00362-9) using the Lennard-Jones (12-6) potential. Up to the third order correction is taken into account for viscosity and thermal conductivity. It is also possible to calculate the binary diffusion coefficients of polar and non-polar gases in non-polar bath gases (Brown et al. 2011, doi:10.1016/j.pecs.2010.12.001). 16 collision integrals are calculated with four digit accuracy over the reduced temperature range [0.3, 400] using an interpolation function of Kim and Monroe (2014, doi:10.1016/j.jcp.2014.05.018).

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("chapensk", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("langenbergstefan/chapensk")

Development version from langenbergstefan/chapensk. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-chapensk

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-chapensk

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-chapensk

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 1.5 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 1.37

74.3%

Coverage · measured lines

2

Dependencies · direct

Check history

OK2026-08-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
WARNING2026-06-08
12 OK · 0 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 96 wordsVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 50%
Documented parameters: not tracked
Return-value docs: not tracked
References docs: 63%

Downloads

2.1K

CRAN downloads in the past year

Rank #13,516 · ~6/day · ~172/mo

Releases R versions

Daily download trend is not available in this view yet.

14430 days

75090 days

2.1K1 year

Compare downloads with other packages →

Also on104 r2u5 autocran

Repository

GitHub ↗ langenbergstefan/chapensk

0Stars

0Forks

0Open issues

0Open PRs

2Releases

6Commits

1Contributors

diffusionlennard-jones-potentialthermal-conductivityviscositykinetic-gas-theory

6 commits · Last activity 2026-06-04

Releases over time

2025-07-30 · 12026-07-07 · 2

Repository practices

Upstream repositoryBeta

Checks run against github.com/langenbergstefan/chapensk on 2026-08-16.

No development-tooling practices detected in the upstream repository.

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Depends (3)

R >= 2.12.0methodsBessel

Imports (0)

none

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (1)

Maintainer (1)

Stefan Langenberg

Author, Maintainer

Authors (1)

Stefan Langenberg

Author, Maintainer

Package Timeline

2 releases. Pick two to compare their code metrics. R releases are shown for context.

0.5Latest
2026-06-04 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
0.4
2026-03-10
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-07-29
Total releases: 2 / 1 yrs
License: GPL-3 OSI
Minimum R: ≥ 2.12.0
Bundled data: 5.2 KB / 4 files
Download size: 113 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("chapensk")

Format

Langenberg, S. (2026). chapensk: Estimation of Gas Properties from the Lennard-Jones Potential (Version 0.5) [Computer software]. https://doi.org/10.32614/CRAN.package.chapensk

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for chapensk version 0.5 [Data set]. HJJB, LLC. Data release v2026-08-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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