1) non-Darcy flow β factor
非Darcy流β因子
1.
This study shows that a branch of steady state may be unstable,or jumps to the other branch of steady state if the non-Darcy flow β factor changes from positive to negative in value,an.
研究表明:当非Darcy流β因子由负变为正时,平衡态的一支可能失去稳定性,或者跳到另一支,系统发生滞后分岔;当系统的空参量和边界压力发生变化时,稳定的平衡态和不稳定的平衡态合为一个鞍结点,系统发生切分岔。
2.
A dynamic model of test system is established to study the seepage properties of non-Darcy flow in rock specimen,and seepage properties parameters(permeability,non-Darcy flow β factor,and acceleration coefficient) of limestone specimens are picked up based on the analysis of individual time series of porous pressure gradient.
利用瞬态渗透法测定了石灰岩在应力–应变全过程的非Darcy流渗透特性,发现一种新的试验现象,即在峰后大应变状态下非Darcy流β因子为负。
2) coefficient of deviating from Darcy-flow
Darcy流偏离因子
3) non-Darcy flow
非Darcy流
1.
Test study on the penetrating properties of non-Darcy flow in rock;
岩样非Darcy流的渗流特性试验研究
2.
The configuration of test system of permeability measurement of non-Darcy flow in post-failure rock,test principle and plan,and the processing method for test data are presented.
02岩石力学伺服试验系统相配套,用来测试单轴峰后给定应变状态下岩样的非Darcy流渗透特性。
3.
Coal samples were collected from a Gas-rich coal mine and standard samples are made from them to obtain the seepage properties of non-Darcy flow of such coal rocks.
为了获得某高瓦斯矿煤岩非Darcy流渗透特性,从该矿采集煤样,制作成标准煤样。
4) non-Darcy flow
非Darcy渗流
1.
One-dimensional consolidation of saturated cohesive soil considering non-Darcy flows
考虑低速非Darcy渗流的饱和黏性土一维固结分析
2.
Currently, the low permeability oilfield in Changqing is in the status of low natural output capacity and difficulty to see injection-water effect of oil extraction well, therefore it is necessary to study non-Darcy flow characteristic and mechanism of low permeability rocks.
由于目前长庆低渗透油田处于自然产能低、采油井难以见到注水效果的状况,因此有必要研究低渗透岩石的非Darcy渗流规律和机理。
3.
In order to improve the precision of consolidation computation,Terzaghi′s one-dimensional consolidation theory is modified based on the non-Darcy flow described by the power function for the lower velocity of flow and the linear function for higher velocity of flow,and the numerical analysis is performed using the finite volume method.
引入可以同时考虑低速渗流曲线段和较高速渗流直线段的非Darcy渗流方程,重新推导饱和黏土一维固结方程,并采用有限体积法对该方程进行数值求解。
5) non-Darcy seepage
非Darcy渗流
1.
One-dimensional consolidation properties of saturated clays with non-Darcy seepage;
非Darcy渗流时饱和粘土的一维固结特性
2.
Terzaghi’s one-dimensional consolidation theory is modified based on the non-Darcy seepage equation considering the initial hydraulic gradient,and the finite difference scheme is introduced.
采用考虑起始水力梯度的非Darcy渗流方程,修正了Terzaghi饱和黏土一维固结理论,给出了相应的有限差分格式,并据此探讨了起始水力梯度对渗流前锋、孔隙水压力和土层固结度的影响。
3.
Terzaghi s one-dimensional consolidation theory is modified based on the modified non-Darcy seepage equation considering the initial hydraulic gradient,and solved by using the finite volume method in this paper.
采用考虑起始水力梯度的非Darcy渗流方程,修正了Terzaghi饱和黏土一维固结理论,并用有限体积法进行了求解。
6) non-darcy flow
非Darcy流动
补充资料：Darcy’s law
分子式：
CAS号：
性质：达西于1830年首次进行清水流经砂层的实验，指出按砂层全部面积计量的表观速度与推动压头成正比，而与砂层厚度成反比。其关系式如下：Q/A=v0=KD(H/L)。式中，Q为单位时间流过的水量，m3/s；A为砂层全部面积,m2；v0为液体的表观速度，m/s；H为砂层两端的压头差，m；L为砂层厚度，m；KD为达西渗水参数，m/s。以后上述关系又为许多人证实，并引入液体温度变化对黏度的影响，写成v=K(△P/μL)，式中，K称为渗透率；μ为液体黏度；△P /L为压力梯度。以上关系式都称为达西定律。这一定律说明流速与压差之间关系是直线关系，属于层流。
CAS号：
性质：达西于1830年首次进行清水流经砂层的实验，指出按砂层全部面积计量的表观速度与推动压头成正比，而与砂层厚度成反比。其关系式如下：Q/A=v0=KD(H/L)。式中，Q为单位时间流过的水量，m3/s；A为砂层全部面积,m2；v0为液体的表观速度，m/s；H为砂层两端的压头差，m；L为砂层厚度，m；KD为达西渗水参数，m/s。以后上述关系又为许多人证实，并引入液体温度变化对黏度的影响，写成v=K(△P/μL)，式中，K称为渗透率；μ为液体黏度；△P /L为压力梯度。以上关系式都称为达西定律。这一定律说明流速与压差之间关系是直线关系，属于层流。
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