Numerical Simulation and Flow Analysis of a 90-Degree Elbow

2020 ◽  
Vol 6 (4) ◽  
pp. 10-13
Author(s):  
Ali Alabdalah ◽  
Lubna Wnos
Keyword(s):  
Numerical Simulation ◽  
Flow Analysis

NUMERICAL SIMULATION FOR FLOW ANALYSIS IN NON-ADIABATIC CAPILLARY TUBES

2017 ◽  
Author(s):  
Hugo Augusto ◽  
Felipe Silva ◽  
Caio Vinicios Juvencio da Silva ◽  
Maycon Ferreira Silva ◽  
Leonardo José Cavalcante Vasconcelos
Keyword(s):  
Numerical Simulation ◽  
Flow Analysis ◽  
Capillary Tubes

Numerical simulation of blow molding?Viscoelastic flow analysis of parison formation

1995 ◽  
Vol 35 (19) ◽  
pp. 1546-1554 ◽  
Author(s):  
Shuichi Tanoue ◽  
Yoshifumi Kuwano ◽  
Toshihisa Kajiwara ◽  
Kazumori Funatsu ◽  
Kousuke Terada ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Analysis ◽  
Viscoelastic Flow ◽  
Blow Molding ◽  
Parison Formation

Formation-Rate-Analysis Technique: Combined Drawdown and Buildup Analysis for Wireline Formation Test Data

1999 ◽  
Vol 2 (03) ◽  
pp. 271-280 ◽  
Author(s):  
Ekrem Kasap ◽  
Kun Huang ◽  
Than Shwe ◽  
Dan Georgi
Keyword(s):  
Numerical Simulation ◽  
Steady State ◽  
Field Data ◽  
Formation Rate ◽  
Flow Analysis ◽  
Early Time ◽  
Late Time ◽  
Time Data ◽  
Analysis Techniques ◽  
Conventional Analysis

Summary The formation-rate-analysis (FRASM) technique is introduced. The technique is based on the calculated formation rate by correcting the piston rate with fluid compressibility. A geometric factor is used to account for irregular flow geometry caused by probe drawdown. The technique focuses on the flow from formation, is applicable to both drawdown and buildup data simultaneously, does not require long buildup periods, and can be implemented with a multilinear regression, from which near-wellbore permeability, p * and formation fluid compressibility are readily determined. The field data applications indicate that FRA is much less amenable to data quality because it utilizes the entire data set. Introduction A wireline formation test (WFT) is initiated when a probe from the tool is set against the formation. A measured volume of fluid is then withdrawn from the formation through the probe. The test continues with a buildup period until pressure in the tool reaches formation pressure. WFTs provide formation fluid samples and produce high-precision vertical pressure profiles, which, in turn, can be used to identify formation fluid types and locate fluid contacts. Wireline formation testing is much faster compared with the regular pressure transient testing. Total drawdown time for a formation test is just a few seconds and buildup times vary from less than a second (for permeability of hundreds of millidarcy) to half a minute (for permeability of less than 0.1 md), depending on system volume, drawdown rate, and formation permeability. Because WFT tested volume can be small (a few cubic centimeters), the details of reservoir heterogeneity on a fine scale are given with better spatial resolution than is possible with conventional pressure transient tests. Furthermore, WFTs may be preferable to laboratory core permeability measurements since WFTs are conducted at in-situ reservoir stress and temperature. Various conventional analysis techniques are used in the industry. Spherical-flow analysis utilizes early-time buildup data and usually gives permeability that is within an order of magnitude of the true permeability. For p* determination, cylindrical-flow analysis is preferred because it focuses on late-time buildup data. However, both the cylindrical- and spherical-flow analyses have their drawbacks. Early-time data in spherical-flow analysis results in erroneous p* estimation. Late-time data are obtained after long testing times, especially in low-permeability formations; however, long testing periods are not desirable because of potential tool "sticking" problems. Even after extended testing times, the cylindrical-flow period may not occur or may not be detectable on WFTs. When it does occur, permeability estimates derived from the cylindrical-flow period may be incorrect and their validity is difficult to judge. New concepts and analysis techniques, combined with 3-D numerical studies, have recently been reported in the literature.1–7 Three-dimensional numerical simulation studies1–6 have contributed to the diagnosis of WFT-related problems and the improved analysis of WFT data. The experimental studies7 showed that the geometric factor concept is valid for unsteady state probe pressure tests. This study presents the FRA technique8 that can be applied to the entire WFT where a plot for both drawdown and buildup periods renders straight lines with identical slopes. Numerical simulation studies were used to generate data to test both the conventional and the FRA techniques. The numerical simulation data are ideally suited for such studies because the correct answer is known (e.g., the input data). The new technique and the conventional analysis techniques are also applied to the field data and the results are compared. We first review the theory of conventional analysis techniques, then present the FRA technique for combined drawdown and buildup data. A discussion of the numerical results and the field data applications are followed by the conclusions. Analysis Techniques It has been industry practice to use three conventional techniques, i.e., pseudo-steady-state drawdown (PSSDD), spherical and cylindrical-flow analyses, to calculate permeability and p* Conventional Techniques Pseudo-Steady-State Drawdown (PSSDD). When drawdown data are analyzed, it is assumed that late in the drawdown period the pressure drop stabilizes and the system approaches to a pseudo-steady state when the formation flow rate is equal to the drawdown rate. PSSDD permeability is calculated from Darcy's equation with the stabilized (maximum) pressure drop and the flowrate resulting from the piston withdrawal:9–11 $$k {d}=1754.5\left({q\mu \over r {i}\Delta p {{\rm max}}}\right),\eqno ({\rm 1})$$where kd=PSSDD permeability, md. The other parameters are given in Nomenclature.

scholarly journals Experimental and CFD Studies of the Hydrodynamics in Wet Agglomeration Process

2018 ◽  
Vol 2 (3) ◽  
pp. 32 ◽  
Author(s):  
Benjamin Oyegbile ◽  
Guven Akdogan ◽  
Mohsen Karimi
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flow Analysis ◽  
Outer Region ◽  
Tangential Velocity ◽  
Numerical Code ◽  
Cfd Model ◽  
Rotating Disc ◽  
Batch Mode ◽  
Agglomeration Process

In this study, an experimentally validated computational model was developed to investigate the hydrodynamics in a rotor-stator vortex agglomeration reactor RVR having a rotating disc at the centre with two shrouded outer plates. A numerical simulation was performed using a simplified form of the reactor geometry to compute the 3-D flow field in batch mode operations. Thereafter, the model was validated using data from a 2-D Particle Image Velocimetry (PIV) flow analysis performed during the design of the reactor. Using different operating speeds, namely 70, 90, 110, and 130 rpm, the flow fields were computed numerically, followed by a comprehensive data analysis. The simulation results showed separated boundary layers on the rotating disc and the stator. The flow field within the reactor was characterized by a rotational plane circular forced vortex flow, in which the streamlines are concentric circles with a rotational vortex. Overall, the results of the numerical simulation demonstrated a fairly good agreement between the Computational Fluid Dynamics (CFD) model and the experimental data, as well as the available theoretical predictions. The swirl ratio β was found to be approximately 0.4044, 0.4038, 0.4044, and 0.4043 for the operating speeds of N = 70, 90, 110, and 130 rpm, respectively. In terms of the spatial distribution, the turbulence intensity and kinetic energy were concentrated on the outer region of the reactor, while the circumferential velocity showed a decreasing intensity towards the shroud. However, a comparison of the CFD and experimental predictions of the tangential velocity and the vorticity amplitude profiles showed that these parameters were under-predicted by the experimental analysis, which could be attributed to some of the experimental limitations rather than the robustness of the CFD model or numerical code.

Flow analysis of plane liquid jet with a controlled shear layer using temporal numerical simulation by diffuse interface model

2020 ◽  
Vol 2020.69 (0) ◽  
pp. 510
Author(s):  
Hiroaki SUGIURA ◽  
Koichi TSUJIMOTO ◽  
Toshihiko SHAKOUCHI ◽  
Toshitake ANDO ◽  
Mamoru TAKAHASHI
Keyword(s):  
Numerical Simulation ◽  
Shear Layer ◽  
Flow Analysis ◽  
Diffuse Interface ◽  
Liquid Jet ◽  
Interface Model ◽  
Diffuse Interface Model

Numerical Simulation Analysis of Bearing Characteristics on Super-Large Diameter Rock Socketed Pile

2014 ◽  
Vol 580-583 ◽  
pp. 432-435 ◽  
Author(s):  
Cheng Zhong Gong ◽  
Chun Lin He ◽  
Ming Xing Zhu
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Large Diameter ◽  
Flow Analysis ◽  
Test Method ◽  
Main Stress ◽  
Pile Cap ◽  
Pile Caps ◽  
S Curve ◽  
Stress Flow

Wujiang Bridge is located on the Wujiang River in Chongqing Province in China. Based on test method of numerical simulation, the bearing characteristics of this large-diameter rock-socket pile with super-thick pile caps have been analyzed, including pile foundation load-bearing characteristics, pile-soil load sharing, and stress flow analysis of thick pile caps. The results indicated that Q-s curve of this kind of pile is approximate to linear. Under the action of ultimate load, the main load was supported by pile end résistance. And according to main stress distribution of pile cap, there is an obvious spatial truss effect phenomenon in it.

The Flow Analysis and Numerical Simulation of the Time-Pressure Dispensing System

2013 ◽  
Vol 401-403 ◽  
pp. 504-508
Author(s):  
Luo Hong Deng ◽  
Zai Liang Chen ◽  
Xiao Min Yang ◽  
Zhen Yu Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Fluid Flow ◽  
Finite Element Modeling ◽  
Spectral Method ◽  
Time Pressure ◽  
Flow Analysis ◽  
Inlet Pressure ◽  
Element Modeling ◽  
Pressure Distributions

The fluid flow of the time-pressure dispensing system was analyzed. Dispensing fluid was analyzed by finite element modeling based on N-S equation. Use CFX module to simulate dispensing process, and obtain the flow fields corresponding velocity & pressure distributions. Study the change rules of the adhesive amount dispensed affected by the inlet pressure, diameter and length of the needle. Finally, compare simulation values with the spectral method for two order approximations, the reliability and applicability of the model is proved.

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