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Relevant bibliographies by topics / Thin Film Solver

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Academic literature on the topic 'Thin Film Solver'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Thin Film Solver"

1

Aljohani, M. A., P. K. Jimack, and M. A. Walkley. "A faster optimal solver for thin film flows." Applied Numerical Mathematics 184 (February 2023): 357–70. http://dx.doi.org/10.1016/j.apnum.2022.10.012.

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Asle-Zaeem, M., and S. D. Mesarovic. "Investigation of Phase Transformation in Thin Film Using Finite Element Method." Solid State Phenomena 150 (January 2009): 29–41. http://dx.doi.org/10.4028/www.scientific.net/ssp.150.29.

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Cahn-Hilliard type of phase field model coupled with elasticity is used to derive governing equations for the stress-mediated diffusion and phase transformation in thin films. To solve the resulting equations, a finite element (FE) model is presented. The partial differential equations governing diffusion and mechanical equilibrium are of different orders; Mixed-order finite elements, with C0 interpolation functions for displacement, and C1 interpolation functions for concentration are implemented. To validate this new numerical solver for such coupled problems, we test our implementation on thin film diffusion couples.

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Zitz, Stefan, Manuel Zellhöfer, Andrea Scagliarini, and Jens Harting. "Swalbe.jl: A lattice Boltzmann solver for thin film hydrodynamics." Journal of Open Source Software 7, no. 77 (September 5, 2022): 4312. http://dx.doi.org/10.21105/joss.04312.

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Naganthran, Kohilavani, Ishak Hashim, and Roslinda Nazar. "Triple Solutions of Carreau Thin Film Flow with Thermocapillarity and Injection on an Unsteady Stretching Sheet." Energies 13, no. 12 (June 19, 2020): 3177. http://dx.doi.org/10.3390/en13123177.

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Thin films and coatings which have a high demand in a variety of industries—such as manufacturing, optics, and photonics—need regular improvement to sustain industrial productivity. Thus, the present work examined the problem of the Carreau thin film flow and heat transfer with the influence of thermocapillarity over an unsteady stretching sheet, numerically. The sheet is permeable, and there is an injection effect at the surface of the stretching sheet. The similarity transformation reduced the partial differential equations into a system of ordinary differential equations which is then solved numerically by the MATLAB boundary value problem solver bvp4c. The more substantial effect of injection was found to be the reduction of the film thickness at the free surface and development of a better rate of convective heat transfer. However, the increment in the thermocapillarity number thickens the film, reduces the drag force, and weakens the rate of heat transfer past the stretching sheet. The triple solutions are identified when the governing parameters vary, but two of the solutions gave negative film thickness. Detecting solutions with the most negative film thickness is essential because it implies the interruption in the laminar flow over the stretching sheet, which then affects the thin film growing process.

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Putri, N. P., F. Al Azis, D. D. Kamasi, and S. P. Sakti. "Determination of Resonance Parameters of The PANI Thin Film Fabricated using Spin Coating Method." Journal of Physics: Conference Series 2110, no. 1 (November 1, 2021): 012008. http://dx.doi.org/10.1088/1742-6596/2110/1/012008.

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Abstract This study aims to determine the resonance parameters of polyaniline thin films to better understand the viscoelasticity properties of polyaniline films. The spin coating method was used with varying solvent concentrations and rotating speed of spin coater during the deposition Polyaniline (PANI) thin film on a quartz crystal microbalance (QCM). To determine the resonance parameters of the PANI thin film, the impedance and QCM frequency measurements were first carried out before and after coated with PANI. The modelling used is a modified BVD model, and the determined resonance parameters are C0, C1, L1, R1, L2 and R2. From the results of the analysis using the GRG Nonlinear solver program, it was found that solution concentration and rotational speed in the spin coating process has a significant effect on resonator parameters of PANI thin film. The best solution concentration from this study was 2% DMF with a rotational speed of 2,000 rpm. This is because in these conditions it provides a minimal damping effect on QCM.

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van Odyck, D. E. A., and C. H. Venner. "Compressible Stokes Flow in Thin Films." Journal of Tribology 125, no. 3 (June 19, 2003): 543–51. http://dx.doi.org/10.1115/1.1539058.

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A multigrid numerical solution algorithm has been developed for the laminar (Stokes) flow of a compressible medium in a thin film. The solver has been applied to two model problems each representative of lubrication problems in a specific way. For both problems the solutions of the Stokes equations are compared with the solutions of the Reynolds equation. The configurations of both model problems were chosen such that based on the ratio film thickness to contact length (H/L) the difference between the Reynolds and the Stokes solutions will be very small, so the geometry of the gap itself does not lead to a significant cross film dependence of the pressure. It is shown that in this situation the compressibility can still lead to a cross-film pressure dependence which is predicted by the Stokes solution and not by the Reynolds solution. The results demonstrate that limitations exist to the validity of the Reynolds equation related to the compressibility of the medium.

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Lee Shin Leong, Md Faisal Md Basir, Nurul Aini Jaafar, Sarkhosh Seddighi Chaharborj, Taufiq Khairi Ahmad Khairuddin, and Kohilavani Naganthran. "NUMERICAL SOLUTIONS FOR THE THIN FILM HYBRID NANOFLUID FLOW AND HEAT TRANSFER OVER AN UNSTEADY STRETCHING SHEET." Open Journal of Science and Technology 3, no. 4 (December 29, 2020): 335–44. http://dx.doi.org/10.31580/ojst.v3i4.1674.

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This paper explores the mathematical model of thin-film flow and heat transfer utilizing hybrid nanofluid along with the two-dimensional time dependent stretching sheet. The influence of several parameters towards the model are discussed and solved by the method of collocation, namely bvp4c solver that can find in MATLAB software. In this paper, we focused on the effect of parameters are unsteadiness parameter λ, thermocapillarity number M, constant mass transfer parameter S, and concentration of towards the model. The numerical results have been obtained and shown in table and graph form. The effect of thermocapillarity number M and concentration of are explored and graphically portrayed through the velocity, temperature and concentration profile.

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POPESCU, A. A., D. SAVASTRU, L. BASCHIR, V. V. VERLAN, O. BORDIAN, M. STAFE, and N. PUSCAS. "SURFACE PLASMON RESONANCE IN As2Se3 PLANAR WAVEGUIDES FOR THE IR SPECTRAL REGION." Chalcogenide Letters 17, no. 3 (March 2020): 117–22. http://dx.doi.org/10.15251/cl.2020.173.117.

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The surface plasmon resonance (SPR) four layers configuration that contains prism of BK7-gold metal film-As2Se3 waveguide-air was realized. As2Se3 thin films with low roughness were obtained by thermal evaporation using cvasi-closed evaporator. The surface roughness’s was less than 2.5 nm. The SPR curves shape calculated by MATLAB solver were identical to these one calculated by matrix method. The As2Se3 films were characterized by ellipsometric spectroscopy and the obtained optical constants were used for calculations. Experimentally obtained SPR curves at the 1064 nm wavelength shown sharp resonance and are in accordance with calculus.

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Agarwal, Lucky, K. Sambasiva Rao, Anshika Srivastava, and Shweta Tripathi. "Ytterbium doped ZnO nanolaminated planar waveguide for ring resonator applications." Journal of Physics D: Applied Physics 55, no. 22 (March 7, 2022): 225106. http://dx.doi.org/10.1088/1361-6463/ac57dd.

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Abstract In the present paper, optical and structural properties of Yb doped ZnO (YZO) are studied for different Yb molar concentrations. The YZO thin films are deposited over the silicon substrate via the sol-gel spin coating method. The range of Yb doping content (concentration) is 0 mol% to 1.5 mol% in ZnO. The morphological variations of the deposited thin film are studied using XRD, FE-SEM, atomic force microscopy, and Ellipsometer. The obtained results indicate that the YZO thin film possesses a single crystalline structure with (1 0 0) as the preferential orientation. All samples have a smooth, dense structure and are free of pinholes. A detailed optical result showed a favorable behavior of YZO thin film for integrated photonic devices. Hence, an optical ring resonator is simulated using MODE and FDTD tool of Lumerical to validate the experimental results. The eigen mode solver is incorporated in MODE (wavelength ranging from 300 to 800 nm) to compute refractive index, propagation constant, group velocity, losses, dispersion and transmission intensity. Furthermore, quality factor, free spectral range and fullwidth at half-maximum of the ring resonator are evaluated using FDTD.

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LeFloch, P. G., and M. Shearer. "Non-classical Riemann solvers with nucleation." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 134, no. 5 (October 2004): 961–84. http://dx.doi.org/10.1017/s0308210500003577.

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We introduce a new non-classical Riemann solver for scalar conservation laws with concave–convex flux-function. This solver is based on both a kinetic relation, which determines the propagation speed of (under-compressive) non-classical shock waves, and a nucleation criterion, which makes a choice between a classical Riemann solution and a non-classical one. We establish the existence of (non-classical entropy) solutions of the Cauchy problem and discuss several examples of wave interactions. We also show the existence of a class of solutions, called splitting–merging solutions, which are made of two large shocks and small bounded-variation perturbations. The nucleation solvers, as we call them, are applied to (and actually motivated by) the theory of thin-film flows; they help explain numerical results observed for such flows.

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Dissertations / Theses on the topic "Thin Film Solver"

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Modi, Arvind. "Direct Immersion Annealing of Block Copolymer Thin Films." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471542724.

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Ulianova, V. O., A. T. Orlov, and O. V. Bogdan. "Formation of ZnO Nanostructured Thin Film by Hydrothermal Method." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35191.

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Formation of zinc oxide nanostructured thin films at different temperatures on Al-coated silicon and lithium niobate substrates by hydrothermal method was presented. The comparison of morphology of nanostructured thin films formed by hydrothermal and electrodeposition method was carried out. The opportunity to use the hydrothermal method instead electrodeposition to obtain nanostructured films on a conductive layer was shown. The dependence of morphology and crystallinity from growth temperature was established using scanning electron microscopy and X-ray diffractometry. The application of synthesized films as sensing layer of acoustic wave based and electrochemical sensors could enhance its sensitivity to pollutants in gas or liquid phases by an active area increasing. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35191

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Reichman, Aaron Michael. "Development of nano-characterization system for polymer film measurement and single BGA solder joint forming experiment." Diss., Online access via UMI:, 2007.

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Samoei, Victor K. "Fabrication and Characterization of Thin film Pressure Sensors using Novel Materials." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1596762165322848.

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Hedong, Zhang, Yasunaga Mitsuya, Yosuke Fujikawa, Akira Fuwa, and Kenji Fukuzawa. "Solvent Effects on Friction Properties of Monolayer Perfluoropolyether Films Coated on Magnetic Disk Surfaces." IEEE, 2009. http://hdl.handle.net/2237/13956.

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Powers, Gerald W. "The effect of temperature on the solvent removal from solution-cast thin polymer films." Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182868409.

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Huq, Abul Fatha Md Anisul. "Interfacial and Solvent Processing Control of Phenyl-C61-Butyric Acid Methyl Ester (PCBM) Incorporated Polymer Thin Films." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427746818.

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Kumar, Manish. "High density and high reliability thin film embedded capacitors on organic and silicon substrates." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26655.

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Thesis (M.S.)--Materials Science and Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Tummala Rao; Committee Member: Pulugurtha Raj; Committee Member: Wong C P. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Hadi, Aseel. "Laser processing of TiO2 films on ITO-glass for dye-sensitized solar cells." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/laser-processing-of-tio2-films-on-itoglass-for-dyesensitized-solar-cells(a2793525-9cf1-4d54-bf7d-a84aabf3ec64).html.

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Mesoporous TiO2 thin film has been considered as a benchmark material in the applications of dye sensitised solar cells (DSSCs) due to a combination of the physical properties that are inherent to the metal oxide and its particular structuring, in addition to its chemical stability and commercial availability. For DSSCs, a more important functionality of mesoporous TiO2 thin films is their extremely high surface and internal surface areas, resulting in high adsorption of dye molecules. However, a major drawback of fabrication of mesoporous TiO2 thin films is its high-temperature furnace sintering at 450Ã ̄ÂÂ°C-500Ã ̄ÂÂ°C for 30 min. The high-temperature process prevents the possibility of integrating different electro-optical devices on the same substrate, and the sintering time required would be a hurdle for potentially rapid manufacturing of mesoporous metal oxide thin films for DSSCs. This thesis demonstrates for the first time the use of a fibre laser with a wavelength of 1070 nm and a pulse width of milliseconds for generation of 1) mesoporous nanocrystalline (nc) TiO2 thin films on ITO coated glass, and 2) compact TiO2 layer and mesoporous TiO2 film on ITO coated glass. The first one was achieved by complete vaporisation of organic binder and inter-connection of TiO2 nanoparticles; and the second one was achieved by full crystallisation of TiO2 precursor to form the compact TiO2 layer and the same sintering process described above. Both processes were one-step, and achieved by stationary laser beam irradiation of 1 minute, compared with 30 min for furnace-sintering to form a mesoporous TiO2 film, and 2 h for two-step furnace treatment to form compact layer and mesoporous film on ITO glass. No thermally damaging of the ITO layers and the glass substrates was observed. The DSSC with the laser-sintered TiO2 photoanode at the optimised laser processing condition of 85 W/cm2 and 100 ms/50 ms pulse mode reached higher power conversion efficiency (PCE) of 3.20% for the TiO2 film thickness of 6 Ã ̄ÂÂm compared with 2.99% for the furnace-sintered; the DSSC with the laser-treated compact TiO2 layer and mesoporous TiO2 film on ITO glass at the optimised laser treatment condition of 85 W/cm2 and 125 ms/25 ms, reached 5.76% compared to 4.83% with the furnace-treated. Electrochemical impedance spectroscopy (EIS) studies revealed that the laser sintering effectively decreased charge transfer resistance and increased electron lifetime of the TiO2 thin films. It is believed that the use of the fibre laser with over 40% wall-plug efficiency offers an economically-feasible, industrial viable solution to the major challenge of rapid fabrication of large scale, mass production of mesoporous metal oxide thin film based solar energy systems, potentially for perovskite and monolithic tandem solar cells, in the future. Another part of the thesis presents a detailed investigation on the improvement of photovoltaic performance of furnace-sintered TiO2 films on ITO-coated glass using an excimer laser with a wavelength of 248 nm and possesses a rectangular beam profile and has a full width at half maximum (FWHM) pulse duration of 13-20 ns. This was achieved by modifying the surface of the furnace-sintered TiO2 films to increase the roughness, which led to increased optical absorbance via light-trapping. The laser process was carried out with variation of laser fluence and number of pulses per unit area. Under the optimised laser fluence of 34 mJ/cm2 and number of pulses of 50, the DSSC with the laser-modified TiO2 photoanode showed a high power conversion efficiency of 2.99% than 2.10% without the laser treatment. EIS studies showed that the films modified under the optimised laser parameter effectively decreased charge transfer resistance and increased electron lifetime of the TiO2 thin films.

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Kevin, Punarja. "On the synthesis, measurement and applications of solar energy materials and devices." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/on-the-synthesis-measurement-and-applications-of-solar-energy-materials-and-devices(9273d60d-cc5a-4992-8fae-ac9ddefa506b).html.

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Second generation solar cells based on thin film semiconductors emerged as a result of the past ten years of intense research in the thin film preparation technology. Thin film solar cell technology can be cost effective as it uses comparatively cheap materials suitable for solar building integration. Chemical Vapour Deposition (CVD) is a well-known method for the deposition of high quality thin films. This thesis describes the synthesis of novel tin(II)dithiocarbamate [Sn(S2CNEt2)2] and bis(diphenylphosphinediselenoato) tin(II) [Sn(Ph2PSe2)2] and these complexes as single source precursor for the deposition of SnS and SnSe and by using the combination of [Sn(Ph2PSe2)2] with [Cu(acac)2], Cu2SnSe3 thin films were deposited by AACVD. By using suitable combinations of metal complexes ([nBu2Sn(S2CNEt2)2], [Cu(S2CNEt2)2] [Zn(S2CNEt2)2] [Zn(Se2CNEt2)2] [Zn(acac)2], [Sn(OAc)4], [Cu(PPh3){Ph2P(Se)NP(Se)Ph2}] thin films and nanocomposites of CZTS, CFTS, CZTSe, CFTSe, CZFTS, , CZFTSe, CZTSSE, CFTSSe and CZFTSSe were prepared. The effect of precursor concentration and deposition temperature on the structure, morphology and composition of the thin films were studied in detail using by powder X-ray diffraction (p-XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and elemental mapping. This thesis addressing the structural inhomogeneity, control of growth and material characterization is expected to yield closer performance parity between CZTS-Se and CIGS solar cells. A series of systematic experiments were carried out. Through AACVD and simple solvothermal methods CZFTS nanoparticles and thin films were prepared. The simple, potentially, low-cost nature of the CZTS nanoparticles and the enhancement of charge carrier mobility achieved suggest that these nanoparticles have potential in the improvement of OFETs and perhaps other organic electronic devices.

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Books on the topic "Thin Film Solver"

1

Advanced characterization techniques for thin film solar cells. Weinheim: Wiley-VCH-Verl., 2011.

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Abban, Sahin, and Kaya Hakim, eds. Thin-film solar cells. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Bosio, Alessio. Thin film solar cells: Current status and future trends. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Bosio, Alessio. Thin film solar cells: Current status and future trends. Hauppauge, N.Y: Nova Science Publishers, 2011.

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(Society), SPIE, ed. Thin film solar technology III. Bellingham: SPIE, 2011.

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service), ScienceDirect (Online, ed. Cu(InGa)Se2 based thin film solar cells. London: Academic, 2009.

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Senoussaoui, Nadia. Einfluss der Oberflächenstrukturierung auf die optischen Eigenschaften der Dünnschichtsolarzellen auf der Basis von a-Si : H und [mu]c-Si: H. Jülich: Forschungszentrum Jülich, Zentralbibliothek, 2004.

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Chubb, Donald L. High efficiency thermal to electric energy conversion using selective emitters and spectrally tuned solar cells. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Bo mo tai yang dian chi guan jian ke xue he ji shu: Key science and technology of thin film solar cells. Shanghai: Shanghai ke xue ji shu chu ban she, 2013.

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Chubb, Donald L. High efficiency thermal to electric energy conversion using selective emitters and spectrally tuned solar cells. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Book chapters on the topic "Thin Film Solver"

1

Zweibel, Ken. "Thin Films." In Harnessing Solar Power, 129–42. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-6110-5_8.

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Poortmans, Jef. "Epitaxial Thin Film Crystalline Silicon Solar Cells on Low Cost Silicon Carriers." In Thin Film Solar Cells, 1–38. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch1.

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Mozer, A. J., and N. S. Sariciftci. "Charge Transport and Recombination in Donor-Acceptor Bulk Heterojunction Solar Cells." In Thin Film Solar Cells, 387–426. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch10.

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Zweibel, Ken. "The Terawatt Challenge for Thin Film Photovoltaics." In Thin Film Solar Cells, 427–62. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch11.

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Reber, Stefan, Thomas Kieliba, and Sandra Bau. "Crystalline Silicon Thin Film Solar Cells on Foreign Substrates by High Temperature Deposition and Recrystallization." In Thin Film Solar Cells, 39–95. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch2.

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Beaucarne, Guy, and Abdellilah Slaoui. "Thin Film Polycrystalline Silicon Solar Cells." In Thin Film Solar Cells, 97–131. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch3.

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Vallat-Sauvain, Evelyne, Arvind Shah, and Julien Bailat. "Advances in Microcrystalline Silicon Solar Cell Technologies." In Thin Film Solar Cells, 133–71. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch4.

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Zeman, Miro. "Advanced Amorphous Silicon Solar Cell Technologies." In Thin Film Solar Cells, 173–236. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch5.

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Klenk, Renier, and Martha Ch Lux-Steiner. "Chalcopyrite Based Solar Cells." In Thin Film Solar Cells, 237–75. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch6.

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Burgelman, Marc. "Cadmium Telluride Thin Film Solar Cells: Characterization, Fabrication and Modeling." In Thin Film Solar Cells, 277–324. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470091282.ch7.

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Conference papers on the topic "Thin Film Solver"

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Ghajar, M., and J. Darabi. "Integration of a Thin-Film Evaporation Submodel With a Micro Loop Heat Pipe Solver." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14730.

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A number of analytical and numerical models have been developed by various researchers to predict the behavior of loop heat pipes (LHP). However, none of those models use the thin-film evaporation principles in the capillary structures to evaluate the local evaporative heat transfer coefficients. In this work, principles of the thin film evaporation are applied in a submodel and combined with our previously developed loop solver model to more accurately simulate the performance of a flat micro loop heat pipe. The resulting code predicts the heat removal capability, surface temperature, and local and average heat transfer coefficients at various applied heat loads. The results indicate that extremely high cross-sectionally averaged evaporative heat transfer coefficients can be achieved. The modeling results are verified by experimental data.

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Lienar, Sebastien. "Characterization of Large Thin Film Membrane Dynamic Behavior with UAI-NASTRAN Finite Element Solver." In World Aviation Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-5518.

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Singh, K., A. Nicoli, R. Jefferson-Loveday, S. Ambrose, P. Paleo Cageao, K. Johnson, S. Mouvanal, J. Cao, and A. Jacobs. "Predictions of Falling Wavy Films Based on the Depth Averaged Thin Film Model and Its Application to Aeroengine Bearing Chamber." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-78010.

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Abstract In the present study, the evolution of a falling wavy film with upstream forced excitation is investigated using the depth averaged thin film model, known as Eulerian Thin Film Model (ETFM). Because of the depth averaging of the governing equations, coarse grids can be used in the wall normal direction. Consequently, this model is computationally efficient when compared to fully resolving thin films and hence highly advantageous for industrial simulations. In the case of a falling wavy film, film thickness and film velocity are closely coupled. A coupled solver that solves the depth averaged continuity and momentum equations simultaneously has been implemented with the provision to apply smoothing to the curvature of surface tension term to improve the accuracy and robustness of the model. The implemented model provides a stable solution for explicit as well as implicit temporal formulations. The performance of the newly implemented ETFM model is evaluated by comparing numerical results with experimental measurements and high-fidelity VOF simulations. The newly implemented model is found to be reliable in predicting free surface film profiles. It is 150 to 415 times computationally cheaper when compared to high-fidelity VOF simulations. The implemented and validated model is successfully used to predict a wavy film on the inlet of a representative aeroengine bearing chamber. The model is able to capture key flow physics on the front face of a static insert, which forms part of the bearing chamber inlet, and agrees well with experimental visualization of oil flow on the insert.

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Nazaripoor, Hadi, Charles R. Koch, and Subir Bhattacharjee. "Dynamics of Thin Liquid Bilayers Subjected to an External Electric Field." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37302.

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Spatiotemporal evolution of liquid-liquid interface leading to dewetting and pattern formation is investigated for thin liquid bilayeres subjected to the long range electrostatic force and the short range van der Waals forces. Based on the 2D weakly non-linear thin film equation three dimensional structure evolution is numerically simulated. A combined finite difference for the spatial dimensions and an adaptive time step ODE solver is used to solve the governing equation. For initially non-wetting surfaces, the stabilizing effects of viscosity and interfacial tension and the destabilizing effect of the Hamaker constant are investigated. Electrostatic interaction is calculated analytically for both perfect dielectric-perfect dielectric and ionic conductive-perfect dielectric bilayers. Ionic conductive-perfect dielectric bilayers based on the electric permittivity ratio of layers are found to be stabilized or deformed in response to the applied external electric field.

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Nicoli, Andrew, Richard Jefferson-Loveday, and Kathy Simmons. "A New OpenFOAM Solver Capable of Modelling Oil Jet-Breakup and Subsequent Film Formation for Bearing Chamber Applications." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90264.

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Abstract To create an adequate computational model of oil behaviour in an aeroengine bearing chamber previous work at the Gas Turbine and Transmissions Research Centre (G2TRC) suggests it is necessary to be able to model oil shedding from bearings, breaking up into droplets/ligaments and forming thin and thick films driven by gravity and shear. Our previously published work using Fluent successfully coupled volume of fluid with the Eulerian thin film model (ETFM) and identified the challenges coupling the ETFM with the discrete phase modelling (DPM). For this latter work comparison was made to published experimental and modelling data in which a jet is injected into a duct breaking up into droplets before forming a wall film. In this paper the use of the open-source CFD code OpenFOAM is investigated for this application recognising that such an approach eliminates some of the restrictions in a commercial product. A transient solver for spray particle cloud modelling and thin liquid film transport (sprayParcelFilmFoam) has been developed and incorporated within OpenFOAM. Fully coupled DPM-ETFM is presented, capable of modelling both primary atomization and secondary breakup. In addition two new film sub-models have been implemented for film stripping and edge separation. In order to achieve accurate statistical representation of droplets, modifications to the DPM particle injector code were implemented. CFD results are validated against published high speed imaging and phase Doppler experimental data and in addition there is a comparison to computational results obtained using ANSYS Fluent. The fidelity of both the solver and the novel surface film sub-models are evaluated against average film thickness measurements along the duct centreline. With the inclusion of both film stripping and edge separation, a normalized root mean squared deviation of 5.1 % was achieved when compared to film thickness measurements, improving significantly on the results obtained with Fluent. A comparison with experimental data of particle diameters and velocities downstream of the expansion edge gives good qualitative agreement. Future work is recommended to provide a better formulation for the edge-separated droplet diameters. Analysis of film momentum source terms highlights the necessity for including both the gas and hydrostatic pressure source terms within the film momentum transport equation. This CFD investigation has successfully established a fully coupled two-way DPM-ETFM approach. This work illustrates an advance in bearing chamber modelling capability and has established a necessary foundation for future aeroengine bearing chamber film modelling.

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Smith, Geoffrey B., Maryna Bilokur, Angus R. Gentle, Matthew D. Arnold, and Michael B. Cortie. "An advanced plasmonic cermet solar absorber for high temperature solar energy conversion applications." In Nanostructured Thin Films X, edited by Tom G. Mackay, Akhlesh Lakhtakia, and Yi-Jun Jen. SPIE, 2017. http://dx.doi.org/10.1117/12.2273598.

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Schuster, Sebastian, Friedrich-Karl Benra, Hans Josef Dohmen, Sven König, and Uwe Martens. "Sensitivity Analysis of Condensation Model Constants on Calculated Liquid Film Motion in Radial Turbines." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25652.

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In many technical processes, a mixture of gas and steam is used as the working fluid in radial turbines. When condensation occurs during expansion, a portion of the liquid droplets can hit the rotor blades and form a water film, which can move in a radial direction and even against the flow direction. Then, the liquid film separates in the rotor tip clearance or at the leading edge of the rotor and forms coarse water droplets. The presence of coarse water droplets in the gap between stator and rotor can cause damage to the turbine rotor. To design a radial turbine which works under condensation conditions, it is essential to know where and when condensation and film formation occur. With this information, it is possible to take action to remove the liquid or to adjust the required maintenance intervals. To examine the details of condensation and film motion, an existing flow solver is extended to capture condensation effects. Models describing nucleation and droplet growth are added to a particle-tracking algorithm. Droplets impinging on the rotor blades form a liquid film. The motion of this liquid film is calculated with a newly developed thin film solver. The calculation tool is validated against third party test rig experiments as well as numerical experiments. For many parameters, the agreement between the calculation tool and the experiments is quite satisfactory. Some results, however, show larger deviations. One of these parameters is the droplet diameter. The numerical results are generally reliable, but an experimental validation is necessary for detailed understanding of the mechanism. Before expensive experiments are conducted, it is recommended to perform a sensitivity study to emphasize important parameters. This sensitivity study is performed concerning a radial turbine for an operating point at which the liquid film travels into the tip clearance. In this paper it will be shown how the thickness and movement of the liquid film change with variation in influencing parameters. Finally, model constants that have the strongest influence on the calculated film motion are highlighted.

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Jäger, Klaus, Grit Köppel, David Eisenhauer, Duote Chen, Martin Hammerschmidt, Sven Burger, and Christiane Becker. "Optical simulations of advanced light management for liquid-phase crystallized silicon thin-film solar cells." In Nanostructured Thin Films X, edited by Tom G. Mackay, Akhlesh Lakhtakia, and Yi-Jun Jen. SPIE, 2017. http://dx.doi.org/10.1117/12.2273994.

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Manley, Phillip, Klaus Jäger, Philipp Tockhorn, Sven Burger, Steve Albrecht, and Christiane Becker. "Optimization of nanostructured high efficiency perovskite/c-Si tandem solar cells via numerical simulation (Conference Presentation)." In Nanostructured Thin Films XI, edited by Tom G. Mackay and Akhlesh Lakhtakia. SPIE, 2018. http://dx.doi.org/10.1117/12.2321240.

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Ahmad, Faiz, Tom H. Anderson, Peter B. Monk, and Akhlesh Lakhtakia. "Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector." In Nanostructured Thin Films XI, edited by Tom G. Mackay and Akhlesh Lakhtakia. SPIE, 2018. http://dx.doi.org/10.1117/12.2320672.

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Reports on the topic "Thin Film Solver"

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Vasileska, Dragica. Unified Numerical Solver for Device Metastabilities in CdTe Thin-Film PV. Office of Scientific and Technical Information (OSTI), August 2017. http://dx.doi.org/10.2172/1395578.

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Ullal, H. S. Polycrystalline Thin Film Solar Cell Technologies: Preprint. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/945980.

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Chang, Yun-Chorng. Surface-Plasmon Enhanced Organic Thin-Film Solar Cells. Fort Belvoir, VA: Defense Technical Information Center, February 2010. http://dx.doi.org/10.21236/ada513773.

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Kapur, V., B. Basol, and R. Kullberg. High-efficiency copper ternary thin film solar cells. Office of Scientific and Technical Information (OSTI), September 1989. http://dx.doi.org/10.2172/5206355.

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Spears, R., R. Parsons, and P. Tretina. Thin film materials research for low-cost solar collectors. Office of Scientific and Technical Information (OSTI), November 1985. http://dx.doi.org/10.2172/5122748.

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Gordon, R. G., R. Broomhall-Dillard, X. Liu, D. Pang, and J. Barton. Transparent Conductors and Barrier Layers for Thin Film Solar Cells:. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/15000095.

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Goldner, R. B. Attaining a solar energy economy with active thin film structures. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/132828.

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Gierow, Paul A. Fabrication of Thin Film Concentrators for Solar Thermal Propulsion Applications. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada409327.

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Meyers, P. Polycrystalline thin film cadmium telluride n-i-p solar cells. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/6772805.

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Walton, James. Thin Film Group II-VI Solar Cells Based on Band-Offsets. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.435.

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