We study the effect of concentration on the drying process and pattern formation of thin concave layer colloidal suspension.Camera is used to capture the drying process.It is shown that with the increase of concentration,the width of broad-ring increases,and the number of the broad-ring decreases.The drying process is divided into five stages,which contain two stages of Marangoni convections.The convection has great influence on the self-organization of colloid particles and film pattern.Pattern formation with the characteristic of thick edge and thin center is mainly caused by the first stage of convection,and multiple broad-ring pattern formation is under the influence of the second stage of convection,which accompanies pin-slip motion of contact line. 更多
; 王育人
Edit Comment