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density loss/blur while advecting by velocity


90okm

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Hi ! i'm trying to learn the very basics of fluid simulation. and building network of microsolvers

 

please take a look to attached scene.

 

there is an empty object with two fields attached - density and velocity

velocity field has a constant +x direction

density is advected by velocity field.

but while density is moving from voxel to voxel it loses data and blures.

 

why does it happen ? is it connected to divergency or it's just an disadvantage of Euler method ?

 

could someone explain me how to set up this simple simulation so that the density would remain constant and not blurred

 

Thanks in advance !

advecting.hip

Edited by 90okm
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