OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Implement Gravity in Shen Chen model › Reply To: Implement Gravity in Shen Chen model August 21, 2019 at 5:46 pm #4515 mgaedtkeKeymaster Hi Simon, that sounds like you have implemented a buoyancy force already and the densities of oil and water differ in your initial conditions. Best, Max