************ moment ************ :: EQ = moment{0|1|2|3} {Galerkin_wt} {MOM0|MOM1|MOM2|MOM3} {Interpol_fnc} ----------------------- **Description / Usage** ----------------------- This card provides information for solving a differential equation for one component of a population balance equation All four moments are expected to be enabled at the same time moment0 | moment1 | moment2 | moment3 Name of the equation to be solved, where the and 3 components correspond to one of the principal coordinate directions, e.g. X, Y and Z for Cartesian geometry. {Galerkin_wt} Two- or four-character value that defines the type of weighting function for this equation, where: * **Q1**-Linear * **Q2**-Quadratic MOM0 | MOM1 | MOM2 | MOM3 Name of the variable associated with the moment equation {Interpol_fnc} Two- or four-character value that defines the interpolation function used * **Q1**-Linear Continuous * **Q2**-Quadratic Continuous Multiplier on mass matrix term ( d ⁄dt ). Multiplier on advective term. Multiplier on diffusion term. Multiplier on source term. Multiplier on divergence term Note: These multipliers are intended to provide a means of activating or deactivating terms of an equation, and hence should be set to zero or one. If a multiplier is zero, the section of code that evaluates the corresponding term will be skipped. ------------ **Examples** ------------ :: EQ = moment0 Q1 MOM0 Q1 1. 1. 1e-6 1. 1. EQ = moment1 Q1 MOM1 Q1 1. 1. 1e-6 1. 1. EQ = moment2 Q1 MOM2 Q1 1. 1. 1e-6 1. 1. EQ = moment3 Q1 MOM3 Q1 1. 1. 1e-6 1. 1. ------------------------- **Technical Discussion** ------------------------- No Discussion. -------------- **References** -------------- Ortiz, Weston, Lisa Mondy, Christine Roberts, and Rekha Rao. "Population balance modeling of polyurethane foam formation with pressure‐dependent growth kernel." AIChE Journal 68, no. 3 (2022): e17529.