An Adiabatic Boundary Condition Solution for Improved Accuracy of Heat-Pulse Measurement Analysis Near the Soil-Atmosphere Interface

2013 ◽  
Vol 77 (2) ◽  
pp. 422-426 ◽  
Author(s):  
Gang Liu ◽  
Lijuan Zhao ◽  
Minmin Wen ◽  
Xupei Chang ◽  
Kelin Hu
Keyword(s):  
Boundary Condition ◽  
Heat Pulse ◽  
Pulse Measurement ◽  
Soil Atmosphere ◽  
Measurement Analysis ◽  
Condition Solution ◽  
Improved Accuracy ◽  
Adiabatic Boundary Condition

scholarly journals Non-isothermal compositional liquid gas Darcy flow: formulation, soil-atmosphere boundary condition and application to high-energy geothermal simulations

2018 ◽  
Vol 23 (3) ◽  
pp. 443-470
Author(s):  
Laurence Beaude ◽  
Konstantin Brenner ◽  
Simon Lopez ◽  
Roland Masson ◽  
Farid Smai
Keyword(s):  
Boundary Condition ◽  
High Energy ◽  
Darcy Flow ◽  
Soil Atmosphere

Heat pulse measurement of thermal properties: an improved fitting technique

Cryogenics ◽  
1993 ◽  
Vol 33 (10) ◽  
pp. 941-946 ◽  
Author(s):  
C.S. McMenamin ◽  
J.P. Bird ◽  
D.F. Brewer ◽  
N.E. Hussey ◽  
C. Moreno ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Heat Pulse ◽  
Pulse Measurement

Unsteady Simulations of a Counter-Rotating Aspirated Compressor

2013 ◽  
Author(s):  
Robert D. Knapke ◽  
Mark G. Turner
Keyword(s):  
Boundary Condition ◽  
Flow Field ◽  
Boundary Conditions ◽  
Mass Flow ◽  
Solid Wall ◽  
Flow Path ◽  
Computational Domain ◽  
Wall Boundary ◽  
Wall Boundary Conditions ◽  
Adiabatic Boundary Condition

An unsteady analysis of the MIT counter-rotating aspirated compressor (CRAC) has been conducted using the Numeca FINE™/Turbo 3D viscous turbulent solver with the Non-Linear Harmonic (NLH) method. All three blade rows plus the aspiration slot and plenum were included in the computational domain. Both adiabatic and isothermal solid wall boundary conditions were applied and simulations with and without aspiration were completed. Comparison of the aspirated case with data is good. When compared to the adiabatic boundary condition, the isothermal boundary condition solutions showed improvements in predicting stage performance, most notably at the endwalls. The aspiration has a significant impact on the flow field and provides a 4.2% increase in efficiency over the non-aspirated case. Although the slot and plenum had been designed to aspirate 1% of the inlet mass flow, the experiment and simulations show that it chokes at about 0.5%. Details of the aspiration flow path choking mechanism, which was previously not well understood, are presented.

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