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Showing papers by "Annamalai Mani published in 2019"


Journal ArticleDOI
TL;DR: In this paper, a new, non-intrusive, increased sensitivity technique based on air-coupled ultrasonics was developed to measure the falling liquid film thickness.

26 citations


Journal ArticleDOI
TL;DR: In this article, the authors presented three-dimensional numerical studies of ejector with swirl generator (SG) using computational fluid dynamics (CFD) software, ANSYS, FLUENT 15.0.

11 citations


Journal ArticleDOI
TL;DR: In this paper, a transparent ejector is designed, fabricated, and operated using air as working fluid, and experimental studies have been conducted to depict the flow patterns in a small rectangular ejector by using schlieren flow visualisation technique.

9 citations


Proceedings ArticleDOI
28 Jun 2019
TL;DR: In this paper, the band gap energy for pure and doped L-Alanine tartrate was calculated from the Tauc's plot and the optical absorption coefficient and reflectance were calculated for both pure and Doped material.
Abstract: Detailed studies on various optical constants were calculated for solution growth crystals of pure and Lanthanum doped single crystals of L-Alanine Tartrate. Slow evaporation technique was used to grow pure L-Alanine Tartrate and Lanthanum doped L-Alanine Tartrate single crystals. Optical absorbance study was carried out by UV-VIS spectrophotometer and it helps to calculate different optical constants. Band gap energy for Pure and doped L-Alanine tartrate was calculated from the Tauc’s plot. Optical absorption coefficient and reflectance were calculated for both pure and doped material. Refractive index and reflectance coefficient were calculated. Extinction coefficient of both L-Alanine Tartrate and Lanthanum doped L-Alanine tartrate was found with respect to absorption coefficient

1 citations


Proceedings ArticleDOI
28 Jun 2019
TL;DR: The impact of barium metal ion and L-Alanine on the mechanical properties of well known non linear optical crystal of L-Tartrate was carried out in this article, where the role of amino acid and metal ion on the Vicker's micro hardness in the above said crystals are analyzed in detail.
Abstract: The impact of barium metal ion and L-Alanine on the mechanical properties of well known non linear optical crystal of L-Tartrate was carried out. Barium L-Tartrate and L-Alanine Tartrate single crystals were grown by slow evaporation technique. Mechanical strength of the crystals was carried out using Vicker’s microhardness tester. Vicker’s micro hardness number and indentation values are driven from the test. Mechanical parameters of these two crystals are carried out from the micro hardness values. Various mechanical constants such as fracture toughness, brittleness index, yield strength, stiffness constants are calculated for both Barium L-Tartarate and L-Alanine Tartarate single crystals. The role of amino acid and metal ion on the Vicker’s micro hardness in the above said crystals are analyzed in detail.The impact of barium metal ion and L-Alanine on the mechanical properties of well known non linear optical crystal of L-Tartrate was carried out. Barium L-Tartrate and L-Alanine Tartrate single crystals were grown by slow evaporation technique. Mechanical strength of the crystals was carried out using Vicker’s microhardness tester. Vicker’s micro hardness number and indentation values are driven from the test. Mechanical parameters of these two crystals are carried out from the micro hardness values. Various mechanical constants such as fracture toughness, brittleness index, yield strength, stiffness constants are calculated for both Barium L-Tartarate and L-Alanine Tartarate single crystals. The role of amino acid and metal ion on the Vicker’s micro hardness in the above said crystals are analyzed in detail.

Proceedings ArticleDOI
28 Jun 2019
TL;DR: In this paper, a single crystal of 2,5-dimethylanilinium chloride monohydrate (DACM) was grown using slow evaporation solution growth technique at room temperature with dimensions 27×4×5 mm3.
Abstract: Single crystal of 2,5-dimethylanilinium chloride monohydrate (DACM) was grown using slow evaporation solution growth technique at room temperature with dimensions 27×4×5 mm3. Single crystal X-ray diffraction studies confirmed that DACM crystallizes in monoclinic crystal system with non-centrosymmetric space group of P21. The presence of functional groups for the grown crystals was confirmed using Fourier Transform Infrared (FTIR) spectroscopy. The optical transparency and cut off wavelength of the grown crystal was examined by UV-Visible spectral studies. Thermal stability and melting temperature of the as grown crystal were identified from TG-DTA analysis. The dielectric constant and dielectric loss has been studied as a function of frequency for various temperatures. Photoluminescence excitation studies showed blue emission radiation occurred at 340.61 nm. Microhardness measurements revealed the mechanical strength of grown crystal. Laser damage threshold studies were carried out for the grown crystal. The second harmonic generation behavior of the grown crystals was confirmed by Kurtz–Perry powder technique.