Please find attached a quick patch to correct Law2_ScGeom_ViscElPhys_Basic documentation to match source code, per discussion https://answers.launchpad.net/yade/+question/691021
(apologies for the delay between the launchpad question and the patch) Daniel
From 1fa0cd10a7831bffb015c2efa10e433f854352a1 Mon Sep 17 00:00:00 2001 From: Daniel Kiracofe <kirac...@ucmail.uc.edu> Date: Mon, 20 Jul 2020 14:42:17 -0400 Subject: [PATCH] correct Law2_ScGeom_ViscElPhys_Basic documentation to match source code, see https://answers.launchpad.net/yade/+question/691021 --- pkg/dem/ViscoelasticPM.hpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/pkg/dem/ViscoelasticPM.hpp b/pkg/dem/ViscoelasticPM.hpp index a2ef0b09a..f00dd1bae 100644 --- a/pkg/dem/ViscoelasticPM.hpp +++ b/pkg/dem/ViscoelasticPM.hpp @@ -137,10 +137,10 @@ public: "the Young modulus (young) and poisson's ratio (poisson) instead of the normal and spring constant (kn and ks). " "In this case, the equivalent parameters are evaluated the same way as the previous case with $kn_x = E_x d_x$, " "$ks_x = v_x kn_x$, where $E_x$, $v_x$ and $d_x$ are Young modulus, poisson's ratio and diameter of particle x. " - "\n\n - If Yound modulus (young), poisson's ratio (poisson), normal and tangential restitution coefficient (en,et) " + "\n\n - If Youngs modulus (young), poisson's ratio (poisson), normal and tangential restitution coefficient (en,et)" "are precised, the equivalent stiffnesses are evaluated as previously: $K_n = 2\\frac{kn_1 kn_2}{kn_1 + kn_2}$, " "$kn_x = E_x d_x$, $K_s = 2(ks_1 ks_2)/(ks_1 + ks_2)$, $ks_x = v kn_x$. The damping constant is computed at each " - "contact in order to fulfill the normal restitution coefficient $e_n = (en_1 en_2)/(en_1 + en_2)$. This is " + "contact in order to fulfill the normal restitution coefficient $e_n = (en_1 + en_2)/2$. This is " "achieved resolving numerically equation 21 of [Schwager2007]_ (There is in fact a mistake in the article from " "equation 18 to 19, so that there is a change in sign). Be careful in this configuration the tangential " "restitution coefficient is set to 1 (no tangential damping). This formulation imposes directly the normal " -- 2.20.1
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