Modeling multi-site emission in porous electrosprays resulting from variable electric field and meniscus size

A model predicting the number of emission sites and total current from a porous conical electrospray emitter as functions voltage is derived. pressure balance between capillary electric forces used to determine an onset criterion for individual menisci, ionic scaling law invoked predict each meniscus emits. These submodels are integrated over phenomenological size distribution area yield performance function five free parameters, two submodel three distribution. Bayesian inference applied these parameters existing dataset [Dressler et al., J. Propul. Power 38, 809 (2022)]. The predictions after training compared experimental data, it found that majority data within 90% credible interval. ability capture key trends in attributed interplay effects: on position-dependent field. calibrated results also suggest surface wetted by series large but sparsely distributed pools propellant. extensibility examined context model-based design array thrusters.