Abstract
In this paper, salt finger (SF) during neutralized chemical reaction has been investigated using a Hele-Shaw cell (HS) placed horizontally towards the gravity. In the acetic acid (CH3COOH) and sodium hydroxide (NaOH) system regular streaky salt finger was appeared at the reaction front while the reaction front had semicylindrical protuberances due to not only salt finger but also Rayleigh-Taylor instability using a HS placed vertically toward the gravity in our previous work. On the other hand, wave number of the salt finger in the hydrochloric acid – NaOH system was less than that in CH3COOH-NaOH system. Therefore it was found that salt finger formation during neutralized chemical reaction depended strongly on the kind of acid.
