TY - JOUR
T1 - Drop shape analysis for determination of dynamic contact angles by double sided elliptical fitting method
AU - Andersen, Nis Korsgaard
AU - Taboryski, Rafael J.
PY - 2017
Y1 - 2017
N2 - Contact angle measurements are a fast and simple way to measure surface properties and is therefore widely used to measure surface energy and quantify wetting of a solid surface by a liquid substance. In common praxis contact angle measurements are done with sessile drops on a horizontal surface fitted to a drop profile derived from the Young-Laplace equation. When measuring the wetting behaviour by tilting experiments this is not possible since it involves moving drops that are not in equilibrium. Here we present a fitting technique capable of determining the contact angle of asymmetric drops with very high accuracy even with blurry or noisy images. We do this by splitting the trace of a drop into a left and right part at the apex and then fit each side to an ellipse.
AB - Contact angle measurements are a fast and simple way to measure surface properties and is therefore widely used to measure surface energy and quantify wetting of a solid surface by a liquid substance. In common praxis contact angle measurements are done with sessile drops on a horizontal surface fitted to a drop profile derived from the Young-Laplace equation. When measuring the wetting behaviour by tilting experiments this is not possible since it involves moving drops that are not in equilibrium. Here we present a fitting technique capable of determining the contact angle of asymmetric drops with very high accuracy even with blurry or noisy images. We do this by splitting the trace of a drop into a left and right part at the apex and then fit each side to an ellipse.
U2 - 10.1088/1361-6501/aa5dcf
DO - 10.1088/1361-6501/aa5dcf
M3 - Journal article
VL - 28
JO - Measurement Science and Technology
JF - Measurement Science and Technology
SN - 0957-0233
M1 - 047003
ER -