In addition , the thesis considered that the pseudo particle model should be used to simulate the microstructure of the multiphase flows . by study of the microstructure of the multiphase flows , we may get a real and accurate model of the interaction between particle to particle and particle to pseudo particle in the multiphase flows , and then may make a great progress in multiphase flows research by using the new combined model 文中認為,流體“擬顆粒”模型適合于計算模擬流場的微觀結(jié)構(gòu),通過流體“擬顆粒”模型對多相流動微觀結(jié)構(gòu)的了解,從而建立顆粒與顆粒間、顆粒與“擬顆?!遍g的相互作用模型,并借助本組合法可能實現(xiàn)多相流研究理論質(zhì)的飛躍。
Based on the thoroughly review and summary in the progress history of the multiphase flows researching in recent fifty years , the thesis was made an advanced discussion on the wide foreground of the multiphase flows " study and application , and clarified some concept of multiphase flows " study . take gas - solid two - phase flows for example , the thesis discussed and classified the theoretical model of multiphase flows " study , that is continuum model , discrete particle model and pseudo particle model , and made a deep and detail discussion on the foundation , advantage and disadvantage about the three physical model . the thesis considered that all the mathematics models of the multiphase flows " study are based on the three physical models 本文在系統(tǒng)、全面地回顧和總結(jié)近五十年來多相流研究發(fā)展歷史的基礎(chǔ)上,進一步論述了多相流研究和應(yīng)用的廣闊前景;澄清了多相流研究中存在的一些模糊概念;以氣固兩相流研究為例,對多相流研究的各種理論模型進行了系統(tǒng)的分析、歸納和分類,從而把氣固兩相流研究的物理模型按其刻劃的尺度和屬性分為三類,即:連續(xù)介質(zhì)模型( continuummodel ) 、離散顆粒模型( discreteparticlemodel ) 、流體擬顆粒模型( pseudoparticlemodel ) ,并對三類物理模型賴于存在的基礎(chǔ)、長處和存在的問題進行了深入的分析、討論;同時指出,多相流研究的各種數(shù)學(xué)模型都是建立在以上三類物理模型的基礎(chǔ)上的,從而對各種數(shù)學(xué)模型的實質(zhì)、優(yōu)缺點和今后發(fā)展方向有了清晰的了解。