OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › Bug Reports › instability problem › Re: instability problem February 10, 2012 at 9:33 am #2035 mathiasKeymaster Dear Jepson,rnrn What are the disrcetisation parameters dx and uMax (cf. log file)? Have you tried to choose a smaller uMax and refine your grid? Is it more stable then?rnrnMathias