Wind can not move out radially in all direction from a point, unless air is manufactured at that point. If you thind of the wind as a divergenceless vector fiel

Wind can not move out radially in all direction from a point, unless air is manufactured at that point. If you thind of the wind as a divergenceless vector field, that situation is not possible. If you heat it up, the air around the point will move outward. It will still not move out of the point, because there's no volume of air in the point that can be heated up, and (b) that's not a time-independent field either. It only works for an instant.