MSC. EASY5 GD Library Overview Governing equations for fluid flow are represented as ordinary differential equations rather than partial differential equations Fluid flow is considered one-dimensional; but this is still a rigorous treatment that includes: Transient energy effects Fluid compressibility No flow or flow reversal possibilities Transient momentum effects in pipes Consideration of moisture condensation - important for ECS applications Gas laws-ideal, Lee-Kestler(built into the library)and user-defined Modeling and Simulation of Gas Systems with MSCEASY5 -Chart 11 MSC XSOFTWAREMSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 11 GD Library Overview • Governing equations for fluid flow are represented as ordinary differential equations rather than partial differential equations. • Fluid flow is considered one-dimensional; but this is still a rigorous treatment that includes: – Transient energy effects – Fluid compressibility – No flow or flow reversal possibilities – Transient momentum effects in pipes – Consideration of moisture condensation- important for ECS applications – Gas laws- ideal, Lee-Kestler (built into the library) and user-defined