ISME2010 , 2010-05-11

Title : ( The Effects of Thermal Shrinkage on Coating Formation in Thermal Spray Processes: A Numerical Approach )

Authors: Seyyed Sina Alavi , Mohammad Passandideh Fard ,

Citation: BibTeX | EndNote

In this paper, we performed a numerical study on the effects of thermal shrinkage on the deposition of molten tin droplets on a steel substrate in thermal spray coating process using Volume-of-Fluid (VOF) method. Thermal shrinkage is a phenomenon caused by variation of density during solidification and cooling down of molten metal. The Navier-Stokes equations along with the energy equation including phase change are solved using a 2-D axisymmetric mesh. We used the VOF method, applied to the fixed Eulerian mesh, to track the free surface of the droplet. For solidification, we used an enthalpy-porosity formulation. The simulations performed in this study are accomplished using both a commercial code (FLUENT) and an inhouse developed program. The results of these scenarios are presented: the normal impacts of 2.7mm spherical tin droplets at 1m/s and 2m/s, initially at 240°C, onto a 27°C steel substrate. It is seen that when the droplet impacts to the substrate with 1m/s velocity, it spreads and solidifies and during the recoil of the droplet, a single cavity forms within the splat which is the source of porosity and is caused by shrinkage.

Keywords

, thermal shrinkage, thermal spray coating, VOF method, solidification,
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@inproceedings{paperid:1018148,
author = {Alavi, Seyyed Sina and Passandideh Fard, Mohammad},
title = {The Effects of Thermal Shrinkage on Coating Formation in Thermal Spray Processes: A Numerical Approach},
booktitle = {ISME2010},
year = {2010},
location = {Tehran, IRAN},
keywords = {thermal shrinkage; thermal spray coating; VOF method; solidification; droplets},
}

[Download]

%0 Conference Proceedings
%T The Effects of Thermal Shrinkage on Coating Formation in Thermal Spray Processes: A Numerical Approach
%A Alavi, Seyyed Sina
%A Passandideh Fard, Mohammad
%J ISME2010
%D 2010

[Download]