Select the 3D container, and open the attribute editor. Under Container Properties set the resolution to: 20X20X20.

Don't try scaling the box instead. This will give different results.

Change Size to 2X2X2.

BoundaryX: None

BoundaryY: -Y side

BoundaryZ: None

Under Contents Method, make sure everything except for the Color Method is set to Dynamic Grid.

Under Dynamic Simulation:

change Simulation Rate Scale to :

2.5

Under Density:

Density Scale: 1
Bouyancy: 5.771
Dissipation: 0.058
Diffusion: 0.003

Under Velocity:

Swirl: 12

Under Turbulence:

Strength: 0.041

Under Temperature:

Temperature Scale: 2.0
Bouyancy: 7.024

Under Fuel:

Fuel Scale: 1.967
Reaction Speed: 0.967