Isothermal Curve Determination in Water to Air Concentric Tube Exchanger Using Finite Difference Method

1995 ◽  
Author(s):  
Raldi Artono Koestoer ◽  
Edwin Legi ◽  
Nandy Setiadi
Keyword(s):  
Numerical Calculation ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Experimental Research ◽  
Personal Computer ◽  
Hot Water ◽  
Annular Space ◽  
Water Flows ◽  
Curve Determination ◽  
Isothermal Curve

Abstract This paper discuss the heat tranfer in the concentric tube with numerical solution. Hot water flow in the inner tube and the force circulation of air has been used to absorb the heat from the inner tube in paralel direction. Kosasih and Koestoer [7] compared the result of experimental research and the numerical calculation of temperatur distribution in annular space. In this work, the calculation with Pascal Programming in Personal Computer, continue to inner side where hot water flows and the heat passed the wall in between of both side. Isothermal curve has been established by figuring the temperature points and it was depicted using AutoCad.

Based on Rheological to Calculate Anchor Parameter for Foundation Pit

2012 ◽  
Vol 538-541 ◽  
pp. 665-668
Author(s):  
Xin Wen Suo ◽  
Chen Min Gu
Keyword(s):  
Shear Stress ◽  
Numerical Calculation ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Strain Rate ◽  
Difference Method ◽  
Rheological Model ◽  
Shear Strain Rate ◽  
Axial Distribution ◽  
Foundation Pit

Pointed to character of rheological mechanics and limited equilibrium method, a new viso-elasto-plastic rheological model is builded with minimum locked load formula abtained.The finite difference method with C++ and inline FISH program ,is applied to analyze engineering instance. Based on calculated results and testing on spot, plentiful key parameters on whole bonged and prestressed bolt is studied.Lastly,the conclusions are open out ,including minimum locked loading,stress and maximal axial distribution of prestressed steal, hump distribution of shear stress on grount,shear strain rate of surface and displacement of reinforced foundation pit and so on.The numerical calculation is coincident with testing factors.

Application of Flexible Reinforcement on Anchored Cave Dwelling Based on Numerical Calculation with Rheology

2010 ◽  
Vol 163-167 ◽  
pp. 3532-3536
Author(s):  
Dong Yu Ji
Keyword(s):  
Numerical Calculation ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Plastic State ◽  
Shear Strain Rate ◽  
Flexible Support ◽  
The Finite Difference Method ◽  
Support Engineering ◽  
Prestressed Anchor ◽  
Surrounding Soil

Pointed to character of flexible support of cave dwelling on prestressed anchor for geotechnical engineering, rheological mechanics was used to analyze support effects,and a new viso-elasto-plastic rheological model was built with locked minimum load formula abtained.Such is the property that bonding soil,surrounding soil,bolts and arc surface were studied.And the finite difference method(FLAC3D) with C++ and inline FISH program were applied to analyze stress, anchor,plastic state,shear strain rate and displacement distribution.Based on calculated results and investigation on spot, plenty of key parameters on whole bonged and prestressed bolt were studied. The numerical calculation is coincident with testing factors.So the theory basis is provided for effective support engineering.

Determination of Air Temperature Distribution in the Annular Space Using Finite Difference Method

1993 ◽  
Author(s):  
Engkos Achmad Kosasih ◽  
Raldi Artono Koestoer
Keyword(s):  
Experimental Data ◽  
Temperature Distribution ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Air Temperature ◽  
Difference Method ◽  
Numerical Solutions ◽  
Air Flow ◽  
Annular Space ◽  
Explicit Equation

Abstract This papers discusses air temperature distribution in the annular space on forced convection of turbulent air flow, which have been determined using numerical method, and compares the result with experimental data. Partial Differential Equations are presented in the final formulation, whereas turbulent flow model applied the simple algebraic model. These equations are changed into numerical equations by means of Finite Difference Method, in the form of explicit equation systems. The steps for solving these systems will be discussed. The comparison between numerical solutions and experimental data shows a good result especially in the fully developed region of the air flow.

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