Electrohydrodynamic Drying Characteristics of Agar Gel

摘要: Heat-based drying methods often produce undesirable changes in the physical and chemical properties of materials. This paper describes non-thermal capability a relatively new technique using electrohydrodynamic (EHD) principles. The EHD system consisted DC power supply with single overhead point electrode an aluminum dish filled 1% agar gel which acted as grounded plate electrode. kinetics was highly linear (R2=0.999) showed about three times faster rate than ambient air-drying control. relationship between water vapor flux electric field strength governed by law (R2=0.90), whereas former varied logarithmically variation gap (R2=0.91). EHD-induced wind considered to be principal driving force accelerated through turbulence vortex motions. Enhanced sublimation occurred from frozen at −14°C.