New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Modifying field values for neighboring cells inside a postprocessor › Reply To: Modifying field values for neighboring cells inside a postprocessor August 22, 2024 at 7:47 am #9133 AdrianKeymaster You are right. Luckily this is easy to fix.