Txoj kev zonal, tseem hu ua "segment method", yog tsim los ntawm HCHottel nyob rau hauv 1958. Nws yog ib tug discrete mathematical qauv txoj kev kawm kub kub pauv tshav kub. Vim tias nws qhov kev simulation raug siab dua li lwm cov qauv digital zoo sib xws, nws yog ib qho cuab yeej zoo dua rau kev tsim kev tshawb fawb thiab kev soj ntsuam offline ntawm cov khoom siv hluav taws xob thiab lwm yam khoom siv thermal.
