Abstract : a continuity wave model is put forward for the dispersion processof liquid - liquid two - phase system, by coupling mass and momentum conservation equations of two - fluid model. the conditions that result in a dispersion choke and the weak instability of a dispersion process are derived from the model. the phenomena of catastrophic inversion and transitional inversion are explained. the effect of drop size distribution on the maximum volume concentration of a emulsion is predicted using the model. according to the theory herein, emulsion inversion is the regime transition of liquid - liquid system due to the instablity of a dispersion process. the effect of drop size distribution on the maximum volume concentration of a liquid - liquid emulsion only occurs in a certain range of weber numbers
文摘:以雙流體模型為基礎,通過質量守恆方程和動量守恆方程的耦合,提出了液-液兩相系中彌散傳質的連續波模型.由該模型得到彌散傳質過程阻
塞和彌散傳質過程弱不穩定性產生的條件,計算了液滴尺寸及其分佈對乳化液極大堆砌分數的影響,解釋了劇變型乳化逆變和漸變型乳化逆變現象.研究結果表明,乳化逆變是由於彌散傳質過程的不穩定性而引起的懸
浮體型態的改變,隨液滴尺寸多分散性的增大,極大堆砌分數增大;隨液滴平均尺寸的增大,多分散性對極大堆砌分數的影響減弱;當韋伯數足夠大時,液滴尺寸及其分佈對乳化液極大堆砌分數無影響
Hydrocarbon fluid samples using a floating piston cylinder, test for obtaining
用
浮動活
塞缸獲取液態烴樣品的試驗
Standard practice for obtaining lpg samples using a floating piston cylinder
用
浮動活
塞柱獲取lpg樣品的標準實施規程
It is especially critical for drip systems that must be kept free of suspended solids and microorganisms that plug small orifices in emitters
對于滴灌系統,水質更加重要,水中必須不含懸
浮的固體顆粒和微生物,以防止阻
塞滴頭出水孔。
It features a data prefetch engine, non - blocking interleaved data cache, dual floating point execution units, and many other goodies
它特有一個數據預取引擎,無阻
塞的交叉數據緩存,雙
浮點執行單元,以及其他一些很好的設計。
If pulmonary embolism is suspected, the history should address unilateral swelling or pain in the legs, recent surgery, or illness requiring prolonged bed rest
當懷疑有肺栓
塞時,病史應注重腿部的單側性
浮腫或疼痛,近期手術史或需長期臥床休息的疾病。
Three - dimension finite element floating mesh method is used to calculate the temperature field and thermal stress of 6aa roller compacted concrete gravity dam section and f6 fault concrete tuck in this paper. the basic theories adopted include heat conduction theory, elastic theory and corresponding finite element calculation equation
本文用三維有限元浮動網格法對6aa壩段及基礎部位f6斷層混凝土塞的施工過程進行溫度場和溫度應力模擬計算,計算的基本理論是熱傳導理論和彈性理論以及相應的有限元計算公式。