[FLASH-USERS] Growing error in magnetic field when updating fluid variables in wind tunnel simulation

[Klaus Weide]

On Thu, 18 Feb 2016, Rukmani Vijayaraghavan wrote:

> 4. I'm using a constant wind inflow for this particular run. One thing I
> checked to see was if there was a round off error in reading my input
> variables into double precision arrays, and this tiny "seed" instability might
> grow, but it doesn't seem to be an issue. What is strange is that the value
> (and sign) of the initial instability varies block-by-block.

Make sure you are setting the guard cells for ALL variables in you 
implementation of the inflow boundary condition, including face variables. 
Otherwise you may end up with undefined values in some guard cells - which 
could well depend on the block.

Klaus