CFD Simulation of Cooling of Coriander Seed under Different Moisture Content

Abstract

CFD simulation of cooling during cryo-grinding of coriander seeds was performing to determine its residence time in conveyer. Coriander seed at different moisture content were simulated and the equations were solved over a defined space and time domain, discredited by computational grids and time steps. Simulation result shows that temperature of coriander seed reduces from 27 to -53oC in 12 sec. The simulation also accounts the effect of moisture content on temperature distribution and time of cooling. The numerical simulation was further verified through cooling experiments with coriander seed by directly dipping them in liquid nitrogen. Simulation data well matched with experimental results. The chilling rate of seed was found to be time, product-temperature and moisture dependent.

CFD simulacija za hlađenje tokom zamrznutog mlevenja semena korijandera je izvedena da se odredi vreme zadržavanja u konvejeru. Simulirana su semena korijandera sa različitim sadržajem vlage i jednačine su rešene za definisan prostorni i vremenski domen, diskreditovan računskim mrežama i vremenskim intervalima. Rezultat simulacije pokazuje da temperatura semena korijandera opada od 27 do -53°C za 12 sec. Simulacija takođe uključuje uticaj vlažnosti na distribuciji temperature i vreme hlađenja. Numerička simulacija je dodatno potvrđena eksperimentima naglog hlađenja semena korijandera direktnim potapanjem u tečni azot.