I have a volcano spewing a lavaflow over the countryside. I have a small valley area protected by an advanced forcefield. It is an extended version of a space going ship's forcefields.
When lava flows on the surface it can form a 'crust' between the air and the 'cooler' surface lava while the internal lava stays hot and fluid. I'm having trouble determining if the lava can act in a similar manner when interacting with a forcefield. I have a feeling that the lava will flow fast and hot against the forcefield...which is not what I want.
I need to know when the forcefield is shutoff/collapses, if the previously heldback lava will continue flowing into the area or not, and how fast (relative to humans fleeing in panic) the lava would then flow.
- What type of plot forcefield would allow the lava to solidify on sustained contact? What plot forcefields should be avoided to avoid hot runny lava dams?
The forcefield will be covering the top of a steep sided valley, so the lava (and heat) will end up only flowing on top of the valley (like a roof). The lava will eventually cover the entire shield but could be thicker on the edges if the shield is slightly curved. It would be more viscous slow moving lava and not originally very runny. Ie more the 10-20km/h lava than the 60km/h lava types.
The forcefield is currently the standard scifi stop radiation/asteroids etc type of forcefield. It stops matter (and air) but allows visuals so I therefore assume energy (as already mentioned by users). It is not a battle ship so only has minor energy deflecting shields (mostly just the normal radiation energy shielding, not designed for directed blasts of energy).
Good point on the baking temperature. Will definitely provide me with some story scenarios in itself.
- I could possibly invest in two shield types. 1 forcefield to stop the actual lava that can be extended across the entire small valley and a 2nd much smaller energy force field to protect an isolated spot in the valley or on/near the ship from the heat (not necessarily both connected to the ship). This would require extra energy generators etc.
- I could just have to use the shields as diversions to give people enough time to flee altogether (was hoping to trap them).
- This revision does not negate any answers provided so far. Which is why I have not removed the originally phrased question. This is because the question is essentially the same, how does the lava act? I knew it was one of two options, fluid and crusty. I have just focused the direction of answers in my intended direction to how can I get the lava to act a certain way (which I now hope is not too story-based).