Mixing 2 nigra fluids to make single 1 entity.

Hey there, I am working on a project and in that project I have 2 nigra fluids and I am thinking to mix those 2 fluids to make a single fluid. Think like I have water and coke like fluids and I want them to mix so that I can create the combination of those. First I thought of using collision system where if those 2 interact then a predefined liquid is made but since I am new to unreal engine I could not accomplish it. Can any one help me how can I achieve this.