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New type of selection: Main Menu -> Edit -> Select -> Select by Object Numbers...
New option to set the factor of translucency for geometric objects, FE-mesh, etc. (Main
Menu -> Options -> Transparency Options...)
DualPerm模塊(2.02版本及以上)用于模擬雙滲透多孔介質(zhì)中二維可變飽和水運(yùn)動和溶質(zhì)運(yùn)移,即優(yōu)先和非平衡水分和溶質(zhì)運(yùn)移。
標(biāo)準(zhǔn)計(jì)算模型
HYDRUS是模擬變量飽和多孔介質(zhì)下的水、熱和多溶質(zhì)二維和三維運(yùn)動的有限元計(jì)算模型。HYDRUS數(shù)值求解飽和非飽和水流的Richards方程和熱傳遞和溶質(zhì)運(yùn)移的對流擴(kuò)散型方程。
水流方程包含一個(gè)下沉期,可導(dǎo)致植物根系吸水。熱傳遞方程考慮了水流傳導(dǎo)和對流運(yùn)動。對流擴(kuò)散的溶質(zhì)運(yùn)移方程的管理是一個(gè)非常普遍的形式,包括固體和液態(tài)非線性非平衡反應(yīng)的規(guī)定以及液體和氣體的線性平衡反應(yīng)。因此,不管是吸附溶質(zhì)還是揮發(fā)溶質(zhì)(如)都已經(jīng)考慮到了。溶質(zhì)運(yùn)移方程還包括了零階生產(chǎn)的影響、其他溶質(zhì)的立一級降解以及一階衰減和生產(chǎn)反應(yīng),以便提供連續(xù)一級鏈中溶質(zhì)間所需的耦合。運(yùn)移模擬也會引起液相對流和擴(kuò)散、氣相擴(kuò)散,因此次模型在液態(tài)和氣態(tài)條件下可同時(shí)模擬溶質(zhì)運(yùn)移。目前HYDRUS多可考慮15種溶質(zhì),在單向鏈中耦合或溶質(zhì)間立運(yùn)移。物理非平衡溶質(zhì)運(yùn)移由雙區(qū)和雙重孔隙公式引起, 并把液相分成移動和不可移動區(qū)域。附著和分離理論,包括過濾理論,病毒、膠質(zhì)和運(yùn)移的模擬也包含在其中。
HYDRUS可用來分析水質(zhì)和溶質(zhì)在非飽和、部分飽和或是飽和多孔介質(zhì)情況下的運(yùn)動。HYDRUS可由不規(guī)則邊界處理水流區(qū)域,水流區(qū)域本身可能是由非均勻土壤組成具有局部各向任意程度。水流和運(yùn)移可能發(fā)生在垂直面,也可能在水平面,具有徑向?qū)ΨQ性的垂直軸或三維區(qū)域。
模型的水流部分可以用來處理連續(xù)或時(shí)變的規(guī)定的方向和流量邊界,以及由氣象條件控制的邊界。土壤表面邊界條件在模擬從給定的流量到規(guī)定的方向類型條件期間可能會發(fā)生變化,反之亦然。它還可以通過水域飽和部分的剩余水量和不排水邊界條件處理自由面邊界。節(jié)點(diǎn)排水是由一個(gè)簡單的模擬實(shí)驗(yàn)關(guān)系為代表。
對溶質(zhì)運(yùn)移來說,軟件既支持連續(xù)和變化的規(guī)定濃度(Dirichlet或first-type)也支持濃度通量邊界(Cauchy或third-type)。彌散張量包含分子擴(kuò)散和曲折的結(jié)果反應(yīng)影響。
Welcome to the website for the HYDRUS software package. Version 1.0 was a successor of the widely used and successful Hydrus-2D / Meshgen-2D software package, originally developed and released by the U.S. Salinity Laboratory in cooperation with the International Groundwater Modeling Center (IGWMC), the University of California Riverside, and PC-Progress, Inc. This version had a completely new graphical environment for both two- and three-dimensional applications, and provided users with much more comfort than the original Hydrus-2D software package. The software was released under the name HYDRUS (2D/3D), with different versions (called Levels) covering both the two- and three-dimensional applications.
Version 2.0, released in early May of 2011, is the first major upgrade of HYDRUS since 2006. In this version, we are expanding the four editions (Levels) which were available in version 1.x of HYDRUS, namely 2D-Lite, 2D-Standard, 3D-Lite, and 3D-Standard, with a new additional Level 3D-Professional. The 3D-Professinal Level will enable you to define transport domains of virtually arbitrary 3D shapes. Another major improvement that should significantly improve the effectiveness of working with HYDRUS is an option to specify various domain properties, and initial and boundary conditions, on Geometric Objects, rather than on FE-Mesh. We have also implemented two new solute transport modules (UNSATCHEM and Wetland) for evaluating the transport of major ions and for simulating processes in natural or constructed wetlands. There are also many other additional improvements and expansions of the model. Version 2.02, released in September 2012, offers three additional add-on modules: DualPerm for simulating two-dimensional variably-saturated water movement and solute transport in dual-permeability porous media, i.e., preferential and nonequilibrium water flow and solute transport, C-Ride for simulating two-dimensional colloid-facilitated solute transport, and HP2, which couples Hydrus (its two-dimensional part) with the PHREEQC geochemical code [Parkhurst and Appelo, 1999] to create this new comprehensive simulation tool (HP2 - acronym for HYDRUS-PHREEQC-2D), corresponding to a similar one-dimensional module HP1. Version 2.03, released in September 2013, uses new fonts improving the look of HYDRUS GUI on Chinese, Japanese and other similar Windows systems. This version also brings a number of new functions.
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相關(guān)產(chǎn)品:spss,pscad,stata,sas,hydrus
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