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fluid-powder interaction

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Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 315-327, May 25–29, 1998,
...Abstract Abstract The first part of this overview on plasma spraying covers the general behavior of plasma jets generated by d.c. and r.f. plasma torches, including the fluid dynamics of such jets. In the second part, interactions of injected powders with the plasma are considered with emphasis...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 229-234, May 24–28, 2021,
... turbulent while developing a vorticity shedding. CFD simulation fluid-powder interaction low pressure cold spraying particle kinematics turbulent flow Thermal Spray 2021: Proceedings from the International Thermal Spray Conference Copyright © 2021 ASM International® May 24 28, 2021 All rights...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 721-727, May 8–11, 2000,
... is triggered by solidification at the edge of the spreading droplet. Interactions with previously deposited splats also cause droplets to splash. droplet splashing nickel powder plasma spraying solidification stainless steel Thermal Spray Surface Engineering via Applied Research: Copyright © 2000...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 887-894, May 25–29, 1998,
... and are driven to the outer regions of the bend due to the centrifugal forces imparted by the flow. In these zones, the gas has a lower velocity resulting in a decrease in the drag force exerted on the particle by the enveloping fluid. Mean velocity, mls Starck powder Relative number Starck powder 20 R=12.7 mm...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 361-366, May 25–29, 1998,
... was modelled by means of a finite difference elliptic code using a simplified turbulence model. Powder particle velocity, temperature history and trajectory were calculated using a stochastic discrete particle model. The heat transfer and fluid flow model were then used to calculate transient coating...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 141-148, May 8–11, 2000,
..., and size along with spray pattern characteristics have been obtained for co-injected NiCrAlY and zirconia powder. The plasma and particle flow fields were also simulated with a pseudo 3-D model using the LAVA computer code. The model assumes that the gas flow is axisymmetric while the particles are treated...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 777-782, May 8–11, 2000,
... quickly while droplet flattens. The droplet flattening after impact has a significant effect on the maximum pressure is located at the front of the droplet at interaction and subsequent contact between the splat and the early stage of deformation, which pushes the fluid moving substrate, but there are few...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 189-196, May 24–28, 2021,
... as there Both CGDS systems have been modeled using the is limited particle-wall interactions. The nozzle walls were commercially available Computational Fluid Dynamics (CFD) modeled as perfectly elastic. In the low-pressure system in ANSYS Fluent 19 software. A grid dependency study was which the powder is fed...
Proceedings Papers

ITSC 2002, Thermal Spray 2002: Proceedings from the International Thermal Spray Conference, 710-715, March 4–6, 2002,
...Abstract Abstract This paper aims to check the informative value of two fluid dynamic computer programs (CFD) for predicting correct trends with regard to different particle speeds and temperatures under changing operating conditions. The variety of numerical models demands a theoretical...
Proceedings Papers

ITSC1996, Thermal Spray 1996: Proceedings from the National Thermal Spray Conference, 637-646, October 7–11, 1996,
..., Canada Abstract In this paper we focus on droplet-substrate interactions under conditions typical of thermal plasma spraying processes. Experiments have shown that the mechanical properties of Material powders are injected into a high temperature plasma plasma-sprayed coatings depend to a large extent...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 211-217, May 8–11, 2000,
... using Ni and Ni/Cr 80/20 spray powders with a mean particle diameter of about 15 μm. The theoretical investigations to describe the flattening process of a droplet show the influence of particle velocity and temperature. It was shown that different material parameters, as latent heat or surface energy...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 237-244, May 8–11, 2000,
... of the physical and chemical processes simulations produced fairly good agreement with experimental involved. This paper presents a detailed numerical measurements. The powder size distribution was found to play simulation of chemical reacting flow and its interaction with a critical role in the amount...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 657-663, May 24–28, 2021,
... atomization fluid: none, low pressure (40 manufactured by Flame-Spray Industries Inc. (FSI) for specialized thermal spray applications. Figure 5 and Figure 6 psi), high pressure (150 psi) show the Plasma Theiaization Process in operation. The primary powder attributes (particle size distribution and Figure 5...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 542-547, May 24–28, 2021,
..., from plasma generation modeling with a width of 10-20 µm so presented here grid contains widely investigated by E. Dalir [3] to fluid interaction with 20x20 µm groves with 40 µm pitch. Figure 2 shows the microtextured surface. Plasma generation, turbulent flow and geometry of the micro-textured...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 335-340, May 25–29, 1998,
... results and experimental stresses inside the coating. This, of course, requires addressing measurements. The model describes fluid flow and heat transfer the deposition problem at both macroscopic and microscopic in the plasma plume; heating, melting and vaporization of levels. injected powder particles...
Proceedings Papers

ITSC1996, Thermal Spray 1996: Proceedings from the National Thermal Spray Conference, 541-546, October 7–11, 1996,
... trajectories resulting in a total power input of 109.5 kW with an efficiency of 68%. good agreement between the calculated and measured particle Powder injection is external to the anode at a rate of 30 velocity, temperature and size distributions. grams^iinute. Due to the h i ^ swirl component of the arc...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1179-1186, May 25–29, 1998,
... of the sprayed material through that of Ti particles before and during spraying damaging of fibers due to a high level of thermal stresses induced at the spraying stage adequate deposition of Ti-based powder to achieve a low-porosity matrix and good impregnation of the fiber array. This contribution deals...
Proceedings Papers

ITSC 2021, Thermal Spray 2021: Proceedings from the International Thermal Spray Conference, 214-220, May 24–28, 2021,
... was polybenzimidazole resin, which is difficult for aluminum particles to attach to nozzle walls. aluminum powder computational fluid dynamics high pressure cold spraying nozzle geometry spray pattern Thermal Spray 2021: Proceedings from the International Thermal Spray Conference Copyright © 2021 ASM...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 737-742, May 8–11, 2000,
... the formed effect of atomization gas pressure and heat input on formed mean droplet sizes have been formulated [Lefebvre 1980]. metal sheets and detached ligaments and droplets, and (3) Although the fundamental physical mechanisms of liquid the fluid dynamic interactions with the metal during sheet breakup...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 669-678, May 8–11, 2000,
... fluid can be temperature, high velocity gas (plasma) flow which are exactly introduced to the capillary in the form of solids, liquids, or gases, what is desired for heating and accelerating powder particles. The as discussed in later sections. When switch S (Figure I)is closed, trick is how to harness...