# Cross Junction

Cross junctions are used to split or merge flow streams with 4 connections. The nomenclature used by fluid flow to describe the various connections follows the naming conventions used by Idelchik. From V3.2 onwards there are no longer any pressure losses associated with cross junctions. This is because the literature relationships are totally inconsistent between the various sources. In addition many of the relationships, expressed as formula are discontinuous, which means that they present special challenges during convergence. At present there are no associated charts with a cross junction.