To optimize well spacing and injection rate in horizontal well flood pattern, formulae of the reasonable injection rate and well spacing are derived under fraction and no-fraction conditions respectively using filtration theory. ... (39) minmaxmax 088.0088.0 pp Q Lhk pp Q LhK D i op i wi P P (40) If injection to production ratio is 1, namely Q ...

New results are presented on interfacial patterns observed for air and water flowing in horizontal 2.54 and 9.53 cm pipelines close to atmospheric conditions. This work differs from previous studies in that measurements of pressure fluctuations at two locations separated in the streamwise direction are used to detect slugs. The liquid flow ...

Abstract. Various flow pattern maps for two-phase gas—liquid flow in horizontal pipes are tested against the 5935 flow pattern observations presently contained in the UC Multiphase Pipe Flow Data Bank. A new flow regime correlation representing an extension of the work done by Govier and Aziz [3] is presented and is shown to be in …

The effects of drag-reducing polymers on the flow patterns, pressure gradients, and drag-reducing rates of oil–water two-phase flows were investigated using a horizontal acrylic pipe with an inner diameter of 25.4 mm and No. 7 white oil with a viscosity of 10.6 mPa∙s and a density of 888.9 kg/m 3 at 25 °C. An aqueous solution of …

Models for predicting flow pattern transitions during steady gas-liquid flow in vertical tubes are developed, based on physical mechanisms suggested for each transition. These models incorporate the effect of fluid properties and pipe size and thus are largely free of the limitations of empirically based transition maps or correlations.

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The best selection of Royalty Free Horizontal Line Pattern Vector Art, Graphics and Stock Illustrations. Download 73,000+ Royalty Free Horizontal Line Pattern Vector Images. …

A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a control board, a central series-fed omnidirectional microstrip array, four configurable parasitic elements, a bottom conducting plate, and a top supporting plate. The …

Cutting values - HSS hard metal Uncoated hard metal Coated scrub-, P25 p 35 P25 p 35 face milling 1.2738 hardened and tempered 30-34 HRC (100)

You can find & download the most popular Pattern Horizontal Vectors on Freepik. There are more than 100,000 Vectors, Stock Photos & PSD files. Remember that these high …

Fig. 17 shows the experimental result of the digital meter images for meter reading recognition. The readings are recognized by a new approach HVB pattern. The images are captured from the front side with different environmental conditions such as, noisy, low illumination condition, uneven illumination condition and so on. - "Digital …

Abstract. Oil-water flow pattern transitions in horizontal pipes have been studied both experimentally and theoretically. A new state-of-the-art, oil-water test facility was designed, constructed and operated. A transparent test section (5.013-cm inside diameter x 15.54-m long) can be inclined at any angle, to study both upward and …

Browse 58,625 incredible Horizontal Pattern vectors, icons, clipart graphics, and backgrounds for royalty-free download from the creative contributors at Vecteezy!

An algorithm is developed which enables the computation of horizontal range and/or depth from a submerged sound source, using ray acoustics and the Lloyd's mirror interference effect, based on Snell's law. Abstract : An algorithm is developed which enables the computation of horizontal range and/or depth from a submerged sound source, using …

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Water-air, 25, 1 atm. 5 cm diam., downflow 1 FLOW PATTERN TRANSITION IN ROUGH PIPES 601 tioned method is directly applicable provided that (dP/dx)~ and (dPldx)os that appear in the MartineUi parameter X and the dimensionless variable Y [7] are calculated for rough pipes. Effect of roughness has been shown to be negligible in the …

Patterns in PowerPoint are two-color designs comprising lines, dots, dashes, checks, etc. PowerPoint includes 48 such patterns with names like Plaid, Weaves, Shingle and Zigzag.This tutorial builds upon …

A density ratio lower than 10 was obtained for steady-state horizontal flow in a 50.8-mm-i.d. stainless-steel pipe, and flow patterns, pressure gradient, and holdup were measured. The experimental results show the effect of the low-density ratio on the stratified to non-stratified flow-pattern transition and the occurrence of the dual ...

A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a …

Flow pattern transition prediction models are presented for oil–water flow in horizontal pipes. The transition between stratified and nonstratified flow is predicted using Kelvin–Helmholtz (KH) stability analysis for long waves. New, simplified, and more practical physical mechanisms/mechanistic models are proposed for the prediction of the …

The two phase water–air mixture flows in a 5-cm diameter and 1-m long vertical pipe. Air and water are mixed in the entrance of the pipe. The grid mesh is depicted in Fig. 1.There are three inlets for air and three inlets for water (see Fig. 2).This inlet configuration allows setting a structured mesh for the simulation and water-gas system …

UPDH and/or LPDH showed a significantly positive correlation with SN-MP, S-Go, Ar-Go, N-Me, and ANS-Me. Understanding the relationship between dentoalveolar height and vertical patterns can help orthodontists modify the position of the teeth to correct the skeletal discrepancy in vertical relation, thus preventing excessive …

Summary. Oil/water flow-pattern transitions in horizontal pipes have been studied botd experimentally and tdeoretically. A new state-of-tde-art oil/water test facility was designed, constructed, and operated. A transparent test section (5.013-cm inside diameter × 15.54 m long) can be inclined at any angle, to study botd upward and …

Vertical variation in the distribution of rocky shore assemblages is greater than horizontal variation, as shown by univariate and multivariate analysis performed with data obtained along 1000 km ...

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for that the major role is played by the clinician and the facial growth pattern also plays an ... vertical skeletal growth pattern. The treatment options for such ... pp. 75-93. 4. Harzer, et al ...

A map of two-phase flow patterns at the 180° of the vertical helical rectangular channel is depicted in Fig. 4. A detailed description is needed because for flow characteristics there is a change in the different position. Generally, the flow pattern map is similar to that of a vertical straight tube; however, some differences are identified.

Dentoalveolar Heights and Vertical Skeletal Patterns in Class I Malocclusion Ardani et al. 210 Correlation between Dentoalveolar Heights and ... (SN-PP), palatal plane and mandibular plane (PP-MP), Frankfort horizontal plane and mandibu-lar plane (FH-MP), sella to gonion (S-Go), articulare to gonion (Ar-Go), nasion to men -

Accurate short-term forecasting is crucial for solar integration in the power grid. In this paper, a classification forecasting framework based on pattern recognition is developed for 1-hour-ahead global horizontal irradiance (GHI) forecasting. Three sets of models in the forecasting framework are trained by the data partitioned from the preprocessing …

Int. J. Multiphase Flow, Vol. 1, pp. 537-553. Pergamon Press, 1974. Printed in Great Britain. A FLOW PATTERN MAP FOR GAS-LIQUID FLOW IN HORIZONTAL PIPES J.M. MANDHANE, G.A. GREGORY and K. AZIZ Department of Chemical Engineering, The University of Calgary, Calgary, Alberta (Canada) (Received November …

The present work completes the fourth basic step in LTCM's flow pattern based work on obtaining a unified approach to modelling two-phase flow and heat transfer inside horizontal round tubes: (i) a generalized flow pattern map, (ii) a flow boiling heat transfer model, (iii) a convective condensation model and (iv) a two-phase frictional ...

The purpose of the present study was to evaluate: (1) changes in the curve of Spee (COS) after clear aligner therapy and (2) whether such changes correlated with the patient's skeletal patterns. Three-dimensional mandibular models of 106 patients (47 males and 59 females; mean age 22.3 SD ± 3.4 years) treated with clear aligners were …

The transition to annular flow in the 9.53 cm pipe occurs in the range of 35-70 m/s. A decrease in pipe diameter to 2.54 cm causes transition to annular flow at slightly lower gas velocities. Two types of waves were observed in the stratified regime. At low enough gas velocities the interface is smooth.

Abstract. An oil-water flow pattern classification and characterization for wellbores is proposed based on the integrated analysis of experimental data, including frictional pressure drop, holdup and spatial phase distribution, acquired in a transparent test section (2 in. ID, 51 ft long) using a refined mineral oil and water (=0.85, =20.0 and =33.5 …

Many flow pattern maps are available for predicting adiabatic two-phase flow regimes in horizontal tubes, such as Baker, 1954, Taitel and Dukler, 1976, Hashizume, 1983, Steiner, 1993. Most of them were developed for adiabatic conditions and then extrapolated to diabatic flow, so the extrapolation procedure may not always produce …