Prediction_Correction Method for Monotone Variational Inequality Under G_norm;
求解單調(diào)變分不等式的G-模意義下的預(yù)估校正算法
According to theory of the infiltraing water in unsaturated zone,the mathematical model,definited for moisture’s movment,is established on the basis of V-G model,then numerical simulation is executed by computer,and the situation of moisture’s movment in two different soil partical diameters is obtained.
為了定量整體描述非飽和-飽和區(qū)域內(nèi)水流入滲過(guò)程,在水分入滲理論基礎(chǔ)上,基于V-G模型建立了非飽和-飽和區(qū)域內(nèi)水流運(yùn)動(dòng)的數(shù)學(xué)模型,分別對(duì)水分在不同粒徑大小土壤中的入滲過(guò)程進(jìn)行模擬;分析結(jié)果表明:入滲水分進(jìn)入土壤的初期,由于粒徑較大的土壤中充氣粗孔的阻隔,使得壓力水頭與粒徑較小的土壤相比減小速率較慢;當(dāng)進(jìn)入滲漏與滲透階段后,粗大孔隙中的空氣基本被水分所驅(qū)替,滲透性較好的土壤中壓力水頭減小速率較大;毛細(xì)管帶高度也是導(dǎo)致下滲速率不同的因素之一,毛細(xì)管高度越大,進(jìn)入滲透階段的時(shí)間越短,反映在壓力水頭的變化上則為壓力水頭變化速率降低。