Withdrawal: Numerical Simulation of Variable-Geometry TBCC Inlet with Smoothly Slid Mechanism

2019 ◽  
Author(s):  
Ting Yue ◽  
Guoping Huang ◽  
Chen Xia
Keyword(s):  
Numerical Simulation ◽  
Variable Geometry

Numerical Simulation of Flow Fields of Variable Geometry Turbine With Spherical Endwalls or Nonuniform Clearance

2009 ◽  
Author(s):  
Guoqiang Yue ◽  
Shengqi Yin ◽  
Qun Zheng
Keyword(s):  
Numerical Simulation ◽  
Flow Fields ◽  
Leakage Flow ◽  
Variable Geometry ◽  
Variable Geometry Turbine

To rotate the vane of variable geometry turbine, the end walls contours of the turbine have to be spherical. If the end walls are cylinders, there will be nonuniform clearances between the ends of the vane and the end walls. In these two cases, the flow fields of the rotated vanes are simulated and compared. Special attentions are paid to the flows in the spherical clearances and nonuniform clearances under four rotating angles. The leakage flow and the loss are investigated and analyzed in this paper.

NUMERICAL SIMULATION OF COUPLED WAVES IN BOREHOLE

2003 ◽  
Vol 11 (04) ◽  
pp. 563-576 ◽  
Author(s):  
UMBERTA TINIVELLA
Keyword(s):  
Numerical Simulation ◽  
Wave Propagation ◽  
Cross Section ◽  
Wave Energy ◽  
Propagation Velocity ◽  
Coupling Effect ◽  
Variable Geometry ◽  
Wave Propagation Velocity ◽  
Characteristic Wave ◽  
Downhole Tool

Borehole drillstring waves play an important role in geotechnical and exploration applications. Coupled waves are simulated inside and outside a real drillstring in borehole. The drillstring is considered a system with variable geometry. We simulated coupled waves in three domains: inner mud, drillstring, and annular mud. Each mode has a characteristic wave propagation velocity. A consequence of this coupling effect is that waves from the downhole tool can be partially reflected and converted to other modes at a discontinuity in the formation stiffness or in the annular cross section that can cause a significant reduction of the transmitted wave energy. Examples of application are reported.

Water uptake by substituted amylose tablets: experimentation and numerical simulation

2009 ◽  
Vol 00 (00) ◽  
pp. 090904073309027-8
Author(s):  
H.W. Wang ◽  
S. Kyriacos ◽  
L. Cartilier
Keyword(s):  
Numerical Simulation ◽  
Water Uptake
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