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Chapter
Reduced-Order Modeling of Reacting Flows Using Data-Driven Approaches
Data-driven modeling of complex dynamical systems is becoming increasingly popular across various domains of science and engineering. This is thanks to advances in numerical computing, which provides high fide...
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Article
Zinc halide complexes of thionicotinamide; crystal structure of dichlorido bis(thionicotinamide-κN)zinc(II)
Zinc halide complexes of thionicotinamide (TNA) having the general formula [Zn(TNA)2X2] (X = Cl–, Br–, I–) are prepared and characterized by thermal analysis, IR and NMR spectroscopy. The crystal structure of one...
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Article
Structural characterization of dicyanidobis-(N,N′-dimethylthiourea-κS)cadmium(II)
A cadmium(II) complex dicyanidobis(N,N′-dimethylthiourea-S) cadmium(II) [Cd(Dmtu)2(CN)2] (1) is prepared and its structure in the solid state is determined by single crystal X-ray structural analysis. The cadmium...
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Article
Mercury(II) cyanide complexes of thioureas and the crystal structure of [(N-methylthiourea)2 Hg(CN)2]
Mercury(II) cyanide complexes of thioureas (Tu), N-methylthiourea (MeTu), and N,N′-dimethylthiourea (DmTu)) have been prepared and characterized by IR and NMR (1H and 13C) spectroscopy, and the crystal structure ...
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Article
Structural characterization of dichloridobis(N,N’-dimethylthiourea-S)cadmium(II)
A cadmium(II) complex, dichloridobis(N,N’-dimethylthiourea-S)cadmium(II), [Cd(Dmtu)2Cl2] (1), was prepared and its structure was determined by X-ray crystal structure analysis. The cadmium(II) ion is four-coordin...
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Chapter
Gene Expression Profiling of Microspore Embryogenesis in Brassica napus
Isolated microspores from selected cultivars of Brassica napus readily form embryos in culture after mild heat stress treatments (32°C for 1–3 days). Transcript profiling methods were used to identify differentia...
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Article
Acoustic receptivity of Mach 4.5 boundary layer with leading-edge bluntness
Boundary layer receptivity to two-dimensional slow and fast acoustic waves is investigated by solving Navier–Stokes equations for Mach 4.5 flow over a flat plate with a finite-thickness leading edge. Higher or...
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Chapter and Conference Paper
Hypersonic Boundary-Layer Receptivity and Stability
The response of a hypersonic boundary-layer to external forcing is computed by solving compressible linearized Navier-Stokes (CLNS) equations. Mach 8 flow past a sharp wedge is considered and calculations are ...
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Chapter and Conference Paper
Nonlinear Crossflow Disturbances and Secondary Instabilities in Swept-Wing Boundary Layers
We numerically solve the governing partial differential equations to study nonlinear evolution of crossflow disturbances in incompressible as well as compressible boundary layers. When the amplitude of these d...
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Chapter and Conference Paper
The Incompressible Attachment-Line Boundary-Layer Stability
In this paper, the stability of the incompressible attachment-line boundary layer is investigated by solving a 2D partial-differential eigenvalue problem. This approach fully incorporates effects of streamline di...
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Chapter
A Generalized Method for the Stability of Incompressible Attachment-Line Flow
The stability of small disturbances in the incompressible swept attachment-line boundary-layer flow is determined by solving the partial-differential eigenvalue problem. Previous theoretical investigations con...
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Chapter
Secondary Instability of Görtler Vortices
Secondary instability of stationary Görtler vortices is studied by using a 2D eigenvalue approach and parabolized stability equations. The Görtler vortex is found to be subject to two types of secondary modes:...
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Chapter
Effect of Crossflow on Görtler Instability
In this paper, some results on the effect of cross flow on Görtler instability in incompressible boundary layers are presented. The results cover a wide range of sweep angles, pressure gradient, and wall curva...
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Chapter
Effect of Mach Number on Instability Waves Generated from a Localized Disturbance
The disturbance wave pattern produced from a harmonic point source in a compressible flat-plate boundary layer is computed using non-parallel linear stability theory and direct numerical integration approach. ...
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Chapter and Conference Paper
Oblique Mode Breakdown in a Supersonic Boundary Layer Using Nonlinear PSE
Nonlinear, compressible parabolized stability equations (PSE) are used to study the transition process in a Mach 1.6 flat plate boundary layer. It is shown that two oblique first-mode waves interacting among t...
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Chapter and Conference Paper
Nonparallel Stability of Rotating Disk Flow Using PSE
We use linear, parabolized stability equations (PSE) to study nonparallel stability of rotating disk flow. We find the nonparallel effect to be small when compared to the quasi-parallel theory of Malik, Wilkin...
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Chapter and Conference Paper
Discrete Modes and Continuous Spectra in a Mach 2 Boundary Layer
The disturbance field (discrete modes and continuous spectra) induced due to a harmonic point source in a Mach 2 boundary layer is studied by using generalized Fourier transform techniques. The results show th...
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Article
On the receptivity and nonparallel stability of traveling disturbances in rotating-disk flow
The generation and evolution of small amplitude long wavelength traveling disturbances in rotating-disk flow is the subject of this paper. The steady rotational speed of the disk is perturbed so as to introduc...
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Article
Traveling disturbances in rotating-disk flow
The stability curves for traveling disturbances in rotating-disk flow are computed using the sixth-order system of incompressible linear stability equations. It is found that the neutral curve has two minima f...
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Chapter and Conference Paper
Transition Research in Low-Disturbance High-Speed Wind Tunnels
The technical requirements and test data from the Mach 3.5 Pilot Low-Disturbance Tunnel are presented. This unique facility provides a test region with essentially zero-acoustic noise and simulates, for the fi...
