The instructions on this page will guide you in modifying a simulation to use the Phoenix Simulator's Adaptive Grid feature. Using an adaptive grid allows the simulation grid to expand according to a specified channel as needed. This can be useful for simulations that drastically change in volume such as explosions or expanding plumes of smoke. These options are found in the Grid rollout of the simulator.
Start by creating a new project from File → Project Window. Click the New button at the top right corner of the window and give it a name.
This is important because Phoenix stores the simulation data in the data directory of the currently selected project. You can manually point to a different project directory from the File → Set Project... dialog.