Sensitivity Analysis on Indium Phosphide Liquid Encapsulated Czochralski Growth

Masi, Maurizio; Fogliani, S.; Carrà, Sergio

doi:10.1002/(sici)1521-4079(199911)34:9<1157::aid-crat1157>3.0.co;2-v

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…Using the case of Ge-20% Si nanocomposite as the nominal case, normalized sensitivity coefficients (NSCs) were calculated for each parameter. Normalized sensitivity coefficients, calculated using Equation (34) express the order of magnitude change in the analyzed function that will result from one order of magnitude change in the concerned parameter [ 37 , 38 ]. Using normalized sensitivity coefficients, one-to-one comparison between the model parameters can be carried out and parameters to which the model is more sensitive to can be determined.…”

Section: Sensitivity Analysis Of the Generalized Effective Medium mentioning

confidence: 99%

Generalized Effective Medium Theory for Particulate Nanocomposite Materials

Siddiqui

Arif

2016

Materials

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The thermal conductivity of particulate nanocomposites is strongly dependent on the size, shape, orientation and dispersion uniformity of the inclusions. To correctly estimate the effective thermal conductivity of the nanocomposite, all these factors should be included in the prediction model. In this paper, the formulation of a generalized effective medium theory for the determination of the effective thermal conductivity of particulate nanocomposites with multiple inclusions is presented. The formulated methodology takes into account all the factors mentioned above and can be used to model nanocomposites with multiple inclusions that are randomly oriented or aligned in a particular direction. The effect of inclusion dispersion non-uniformity is modeled using a two-scale approach. The applications of the formulated effective medium theory are demonstrated using previously published experimental and numerical results for several particulate nanocomposites.

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Section: Sensitivity Analysis Of the Generalized Effective Medium mentioning

confidence: 99%

Generalized Effective Medium Theory for Particulate Nanocomposite Materials

Siddiqui

Arif

2016

Materials

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“…Meanwhile, a more convenient and comprehensive way of presenting the findings of sensitivity analysis is through Normalized Sensitivity Coefficients (NSC) [87]. It allows the direct (one-onone) comparison of parameters whose order of magnitude could be significantly different [88].…”

Section: Sensitivity Analysismentioning

confidence: 99%

Exergoeconomic optimization of a shell-and-tube heat exchanger

Jamil

Goraya

Shahzad

et al. 2020

Energy Conversion and Management

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The paper presents an economic optimization of STHX with two commonly adopted (i.e., Kern and Bell-Delaware) and one rarely explored (i.e., Wills-Johnston) methods. A detailed numerical code concerning thermal, hydraulic, exergy, and economic analysis of STHX is developed for all three methods. Normalized sensitivity analysis, parametric study, and Genetic Algorithm are used to ascertain the most influential parameters and optimize the total cost. It is observed that the calculations made using the Wills-Johnston method were reasonably close to the Bell-Delaware method. While the Kern method showed a significant deviation in the shell side calculations because of the several assumptions in this method. The parametric analysis showed that increasing the mass flow rate and the number of baffles increased the operating cost because of an exponential increase in the pressure drops. Finally, the optimization reduced the heat transfer area by ~26.4%, capital cost by ~20%, operational cost by ~50%, total cost by ~22%, and the stream cost by ~21%.

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“…Masi et al. 25 used a mathematical model to normalize sensitivity coefficients so that they could compare assumed parameters. They found more important and effective parameters to control the objective function.…”

Section: Introductionmentioning

confidence: 99%

Predicting unbalance asymmetric rotor vibration behavior based on sensitivity analysis and using Response Surface Methodology method considering parallel misalignment

Jamshidi

Jafari

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Mass unbalance, shaft misalignment, rotor asymmetry, and force due to rotor weight are the main causes of vibrations in rotary machines especially when the shaft is not symmetric. Although extensive researches have been carried out to determine the effect of each on the increase of vibration levels far, there has been no clear study on the simultaneous existence of all these parameters and their interactions. In this research, the model is a rotor composed of a rigid disk and a flexible asymmetric shaft. The general equations of motion are first derived by considering the effect of high order large deformation in bending. The equations are discretized using the Rayleigh–Ritz method. The obtained equations are nonlinear coupled differential equations that are solved using the numerical method. Sensitivity analysis has been utilized to identify the percentage of the contribution of each parameter to the increase of vibration. Then a DOE-based Response Surface Methodology (RSM) is applied to present a model to predict the vibration behavior of the system with good accuracy. Genetic algorithm is also used to optimize the effective parameters and to verify the results. A 3D model of the asymmetric rotor is carried out in experimental studies to attain more precise responses. The research shows that rotor asymmetry alone and also its combination with gravitational force has much more effects on the vibration amplitude. These effects are observed at frequencies both once and twice the rotational speed in spectral data, in comparison with other factors. The mass unbalance also plays a significant role in frequency equal to the rotational speed. In the end, the achieved results are validated with experimental simulations.

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Sensitivity Analysis on Indium Phosphide Liquid Encapsulated Czochralski Growth

Cited by 15 publications

References 34 publications

Generalized Effective Medium Theory for Particulate Nanocomposite Materials

Generalized Effective Medium Theory for Particulate Nanocomposite Materials

Exergoeconomic optimization of a shell-and-tube heat exchanger

Predicting unbalance asymmetric rotor vibration behavior based on sensitivity analysis and using Response Surface Methodology method considering parallel misalignment

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