free-surface flow 中文意思是什麼
free-surface flow
解釋
自由表面流-
Finite volume method is appilied in numerical modeling of the flow in no - pressure tunnel of high water reservoir in this paper. i select standard k - turbulence modeling that put forward by launder and spalding in 1972 by weighted poly - turbulence modeling. the difficulty is that there is free surface in flow, but free surface problem ' s calculating region is indefinitely
本文利用有限體積法對高水頭下水庫無壓泄水洞水流進行了紊流數值模擬，根據多種紊流模型的優缺點進行比較，選擇了launder和spalding於1972年提出的標準的k ?紊流模型。 -
Steady free surface flow
定常無壓流 -
The result show that the position of free surface is higher because of frusta of brake, especial obvious in the head of frusta of brake ; flux coefficient and pressure on dam are quite influenced by type of frusta and 3 a type frusta of brake relative to 2 type frusta of brake has bigger flux coefficient and smaller pressure on dam ; obvious influence of ability of discharge flow for different ratio of thickness of frusta and breadth of brake and pressure on dam reduces with increasing ration of thickness of frusta and breadth of brake, while bigger flux coefficient is obtained when tlb = 0. 2
結果表明，閘墩河海大學博士論文的存在抬高了水面線的位置，其中在閘墩頭部尤其明顯;墩型對流量系數和壩面壓力影響較大， 3a型閘墩相對於2型閘墩具有更大的流量系數和更小的壩面壓力:不同的墩厚閘寬比t / b對泄流能力也將產生顯著的影響，隨著墩厚閘寬比的增加，壩面壓力降低，而當t / b二0 . 2時溢流壩具有更大的流量系數。 -
Aiming at the medium thickness slab caster in anshan isco, numerical simulations concerning fluid flow and free surface wave process of liquid steel in mold were conducted by using the cfx4. 4, a commercial software package for fluid flow analysis, in which the metallurgical functions of a submerged nozzle, specially the submerged nozzle with three holes, were investigated emphatically
摘要以鞍鋼中薄板坯連鑄機為對象，在商業軟體cfx4 . 4的平臺上對結晶器內鋼水流動和液面波動過程進行了數值模擬，重點研究了其所獨有的3孔浸入式水口的冶金功能。 -
A flow induced vibration model based on grid - free surface vorticity method
一種基於表面渦方法的流體誘導管束振動計算模型 -
( 6 ) 3d integer model of spillway and frusta of brake are established and numerical computation of 3d viscous flow over spillway is completed. the influence of frusta of brake for design parameters such as shape of free surface, pressure on dam, flux coefficient is computed aim at type of frusta of brake and disposal on dam and compute result of different type of frusta and disposal model is compared
6 ）通過建立溢流壩和閘墩的三維整體模型，完成了對三維過壩水流粘流場的數值計算，針對閘墩的型式及在壩面的布置計算了閘墩對水面線形狀、壩面壓力、流量系數等設計參數的影響，並將不同墩型與布置形式的計算結果進行比較。 -
In order to study the characteristics of the stepped spillway overflow comprehensively and seek for the measure to increase the energy dissipation of the stepped spillway at large unit discharge, the method of turbulence numerical simulation and model test are used to study the stepped spillway overflow. in view of the curved free water surface, complicated boundary condition and turbulence flow, it very difficult to simulate the stepped spillway overflow
為了對階梯溢流壩面流場特性進行全面的研究，同時探求在大單寬流量下提高階梯溢流壩消能率的措施，本文採用紊流數值模擬與實驗相結合，數值計算為主、實驗為輔的研究方法對階梯溢流壩面流場進行了較系統深入的研究。 -
Water moves across the soil surface away from the drip emitter until the infiltration rate of the ponded area matches the emitter discharge rate. beyond this free - water pond water moves into the soil by unsaturated flow. it is very important to research the characteristic and pattern of trickle source infiltration
滴灌條件下水分運移的本質是微源入滲過程，因此，為了充分發揮滴灌優勢，正確調控作物的土壤水分條件，對微源入滲特性規律的研究非常必要。
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