Here is some information that you might be able to use to answer the question.

First, even people with only a little interest in science are aware that there are several kinds of volcanic eruptions and your volcano model cannot demonstrate every type of eruption.

Vulcanian”-type eruption, in which a dense cloud of ash-laden gas explodes from the crater and rises high above the peak. Steaming ash forms a whitish cloud near the upper level of the cone.

Strombolian-type eruption huge clots of molten lava burst from the summit crater to form luminous arcs through the sky. Collecting on the flanks of the cone, lava clots combined to stream down the slopes in fiery rivulets

In a Vesuvian” eruption great quantities of ash-laden gas are violently discharged to form cauliflower-shaped cloud high above the volcano.

In a “Peléan” or “Nuée Ardente (glowing cloud) eruption a large quantity of gas, dust, ash, and incandescent lava fragments are blown out of a central crater, fall back, and form tongue-like, glowing avalanches that move downslope at velocities as great as 100 miles per hour.

In fissure-type eruptions, molten, incandescent lava spurts from a fissure on the volcano’s rift zone and feeds lava streams that flow downslope. In central-vent eruptions, a fountain of fiery lava spurts to a height of several hundred feet or more. Such lava may collect in old pit craters to form lava lakes, or form cones, or feed radiating flows.

The most powerful eruptions are called “plinian” and involve the explosive ejection of relatively viscous lava can send ash and volcanic gas tens of miles into the air. The resulting ash fallout can affect large areas hundreds of miles downwind. Fast-moving deadly pyroclastic flows (“nuées ardentes”) are also commonly associated with plinian eruptions.

So although your model may demonstrate one type of volcanic eruption it does not and cannot demonstrate how ALL volcanoes erupt.

Additionally, the composition of materials (liquids or dry ice etc.) that you used to make your volcanoe erupt is obviously different than that of a real volcano.

Volcanos generally can be dormant or relatively active but not explosive for many years while pressure builds. Your model cannot demonstrate this pressure or the conditional components of a real volcano.

Hope this helps you some 🙂