CFDtool Matlab- Lava flow

I have a project I need help with that involves the CFDtool Matlab - Lava flow. The desired outcome of the CFDtool analysis is to identify flow patterns. Basically I have a project for my fluid and particle mechanics course and I want to build a simulation. Varying the viscosity, flow speed of lava flowing down a volcano and the variation it creates changing these variables. Variations might be the distance the lava travels, the time it takes to solidify. how changes in viscosity affect flow dynamics and surface textures. etc.