Rheology and Computer Codes

1990 ◽  
pp. 377-404
Keyword(s):  
Computer Codes

Thermal Destruction Behavior of Plastic and Nonplastic Wastes in a Laboratory-Scale Facility

1996 ◽  
Vol 118 (4) ◽  
pp. 269-276 ◽  
Author(s):  
A. K. Gupta ◽  
E. Ilanchezhian ◽  
E. L. Keating
Keyword(s):  
Thermal Destruction ◽  
Laboratory Scale ◽  
Operational Parameters ◽  
Feed Composition ◽  
Equilibrium Study ◽  
Toxic Emissions ◽  
Calculation Results ◽  
Computer Codes ◽  
Combustion Tests ◽  
Experimental And Theoretical Studies

Experimental and theoretical studies are presented from a laboratory-scale thermal destruction facility on the destruction behavior of surrogate plastic and nonplastic solid wastes. The nonplastic waste was cellulosic, while the plastic waste contained compounds, such as polyethylene, polyvinyl chloride, polystyrene, polypropylene, nylon, rubber, and polyurethane, or any of their desired mixtures. A series of combustion tests was performed with samples containing varying composition test was performed with samples containing varying composition of plastic and nonplastic. Experimental results are presented on combustion parameters (CO, excess air, residence time) and toxic emissions (dioxin, furan, metals). Equilibrium thermochemical calculations are presented on the thermal destruction behavior of samples under conditions of pyrolysis, combustion, and pyrolysis followed by combustion. Special interest is on the effect of waste properties and input operational parameters on chemistry and product composition. STANJAN and SOLGASMIX computer codes were used in the chemical equilibrium study. Analysis and interpretation of the data reveal the effect of waste feed composition on combustion parameters and dioxin, furan, and metals emission. Equilibrium calculation results are used to describe the experimentally observed trends for the thermal destruction behavior of these wastes. The results show significant influence of plastic on combustion characteristics, and dioxin, furan, and metals emission.

Computer Codes for Phonetic Symbols

1993 ◽  
Vol 23 (2) ◽  
pp. 83-97 ◽  
Author(s):  
John H. Esling ◽  
Harry Gaylord
Keyword(s):  
Computer Codes

The process of assigning computer codes to phonetic symbols began when the 1989 Kiel Convention of the International Phonetic Association was called to revise the Association's alphabet. The Workgroup on Computer Coding formed at that time had the task of determining how to represent the IPA alphabet numerically, and of developing a set of numbers referring to IPA symbols unambiguously. This involved assembling phoneticians who work with computer representations of phonetic symbols, and communicating with specialists in computer coding to gauge the fit between the phonetician's perspective on symbol usage and the non-phonetician's understanding of how to identify and use phonetic symbols. Prior to Kiel, a collection of practical approaches to coded representations was outlined in JIPA (Esling 1988), which dealt mainly with keyboard assignments of characters.

scholarly journals Simulation codes for light-ion diode modeling

1994 ◽  
Vol 12 (2) ◽  
pp. 283-324 ◽  
Author(s):  
J.P. Quintenz ◽  
D.B. Seidel ◽  
M.L. Kiefer ◽  
T.D. Pointon ◽  
R.S. Coats ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Power Flow ◽  
Ion Beam ◽  
Inertial Confinement ◽  
Beam Diagnostics ◽  
Computational Tools ◽  
Field Diffusion ◽  
Confinement Fusion ◽  
Computer Codes ◽  
Inertial Confinement Fusion Program

The computational tools used in the investigation of light-ion diode physics at Sandia National Laboratories are described. Applied-B ion diodes are used to generate intense beams of ions and focus these beams onto targets as part of Sandia's inertial confinement fusion program. Computer codes are used to simulate the energy storage and pulse forming sections of the accelerator and the power flow and coupling into the diode where the ion beam is generated. Other codes are used to calculate the applied magnetic field diffusion in the diode region, the electromagnetic fluctuations in the anode-cathode gap, the subsequent beam divergence, the beam propagation, and response of various beam diagnostics. These codes are described and some typical results are shown.

Heat Transfer Committee and Turbomachinery Committee Best Paper of 1996 Award: The Path to Predicting Bypass Transition

1997 ◽  
Vol 119 (3) ◽  
pp. 405-411 ◽  
Author(s):  
R. E. Mayle ◽  
A. Schulz
Keyword(s):  
Boundary Layer ◽  
Kinetic Energy ◽  
Energy Equation ◽  
Free Stream ◽  
Bypass Transition ◽  
Turbulence Level ◽  
Free Stream Turbulence ◽  
Energy Profiles ◽  
Computer Codes ◽  
Good Agreement

A theory is presented for calculating the fluctuations in a laminar boundary layer when the free stream is turbulent. The kinetic energy equation for these fluctuations is derived and a new mechanism is revealed for their production. A methodology is presented for solving the equation using standard boundary layer computer codes. Solutions of the equation show that the fluctuations grow at first almost linearly with distance and then more slowly as viscous dissipation becomes important. Comparisons of calculated growth rates and kinetic energy profiles with data show good agreement. In addition, a hypothesis is advanced for the effective forcing frequency and free-stream turbulence level that produce these fluctuations. Finally, a method to calculate the onset of transition is examined and the results compared to data.

Computer codes. The ubiquitous bit

1980 ◽  
Vol 26 (7) ◽  
pp. 523
Author(s):  
W.D. Randall
Keyword(s):  
Computer Codes

Simplified Development Method of FEA Code for Sloshing of Floating Roof Tanks (Lagrangian Formulation for Axisymmetric Linear Problem)

2014 ◽  
Author(s):  
Shoichi Yoshida
Keyword(s):  
Linear Problem ◽  
Structural Integrity ◽  
Three Dimensional ◽  
Computational Time ◽  
Storage Tanks ◽  
Coupling Vibration ◽  
Development Method ◽  
Oil Storage ◽  
Fluid Behavior ◽  
Computer Codes

Floating roofs are widely used to prevent evaporation of content in large cylindrical aboveground oil storage tanks. The 2003 Hokkaido Earthquake caused severe damages to the floating roofs due to sloshing. These accidents became a cause to establish structural integrity of the floating roof tanks in sloshing. However, many designers do not have a solution for the sloshing of floating roof tanks except for three-dimensional FEA computer codes. The three-dimensional FEA requires a long computational time and expenses. The sloshing of floating roof tanks is a coupling vibration problem with fluid and structure. The simplified and convenient method has been desired for this solution. This paper presents a simplified development method of a FEA code in the axisymmetric linear problem. It is performed to modify an existing structural analysis code. The fluid behavior is formulated in terms of displacement as the Lagrangian approach.

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