numerical simulation on the suppression of crucible wall

Three

2014/9/1A series of numerical simulations of crystal growth in an industrial CZ furnace is accomplished. Fig. 3 shows the distribution of the velocity, temperature and oxygen concentration in the melt without turning on the magnetic field, when the 127 mm crystal is grown to a length of 100 mm with the crystal and crucible rotation rate fixed at 16 and −0.5 rpm, respectively.

Suppression of the von Krmn vortex street behind a

An advanced moving-wall control strategy to manage the unsteady separated flow over a circular cylinder is developed. A two-dimensional numerical simulation of the flow over the cylinder at Re =500 based on diameter indicates that, when the downstream half of the cylinder surface is made flexible to form an appropriate travelling transverse wave, a 'fluid roller bearing' (FRB) is produced

Drag reduction of compressible wall turbulence with

Direct numerical simulations are carried out to assess the potential drag reduction of compressible turbulent flow between isothermal walls. For the sake of achieving drag reduction, the flow is actively controlled by deformable dimples lying on the bottom wall of the channel. The first stage of the procedure consists in assessing the optimum geometry of the dimples. In this regard, the lower

Numerical simulation of particle interactions with wall

This paper presents the results of a numerical investigation of the effects of near-neutral density solid particles on turbulent liquid flow in a channel. Interactions of particles, in a size range about the dissipative length scale, with wall turbulence have been simulated at low volume fractions (average volume fraction less than 410SUP-4/SUP). Fluid motion is calculated by directly

Numerical investigation on fluid forces of piggyback

Numerical simulations of flows past the piggyback circular cylinders in tandem arrangement are performed by solving the variational multiscale formulation of the incompressible Navier–Stokes equations using in-house finite element method (FEM) codes. The effects of the gap-spacing-to-diameter (G/D) and the two diameter ratio (d/D) on the flow characteristics and the reductions of the root

Direct numerical simulation of conical shock

Direct numerical simulation of conical shock wave–turbulent boundary layer interaction - Volume 877 The analysis of CSBLIs is inherently more difficult than for planar SBLIs, in that the flow field past a conical shock is not uniform, and the wall pressure rise is not

PAPER OPEN ACCESS Numerical Simulation of Polysilicon Solid

Numerical Simulation of Polysilicon Solid-liquid Interface Transmogrification in Heat Transfer Process surface and crucible exterior wall, respectively; x and z are heights of furnace inner surface and crucible exterior wall, respectively. The typical 3. Results

A Numerical Study on the Growth Process of InGaSb

This numerical simulation predicted that diffusion is dominant in the growth process of InGaSb under both normal and microgravity conditions. In spite of the above-mentioned experimental and numerical studies carried out for the growth of high-quality InGaSb crystals, to date, the role of growth kinetics in growth of InGaSb crystals is still not fully understood.

Theoretical and numerical study on high frequency vibrational

1 Theoretical and numerical study on high frequency vibrational convection: influence of the vibration direction on the flow structure Samia Bouarab1,2, Faiza Mokhtari1, Slim Kaddeche3, Daniel Henry 4, Valry Botton,5, Abdessamed Medelfef 1,41Laboratoire de Thermodynamique et Systmes Energtiques, Facult de Physique, Universit des Sciences et de

Modern numerical methods and their applications in

2019/11/9Numerical simulation is a powerful tool to solve scientific and engineering problems. It plays an important role in many aspects of fundamental research and engineering applications, for example, mechanism of turbulent flow with/without viscoelastic additives, optimization of processes, prediction of oil/gas production, and online control of manufacturing.

Numerical studies of wall–plasma interactions and

The U.S. Department of Energy's Office of Scientific and Technical Information article{osti_22599969, title = {Numerical studies of wall–plasma interactions and ionization phenomena in an ablative pulsed plasma thruster}, author = {Yang, Lei and School of Astronautics, Beihang University, Beijing 100191 and Zeng, Guangshang and Huang, Yuping and Tang, Haibin and Liu, Xiangyang

Experimental investigations and numerical modelling

Numerical modelling 2D steady-state modelling We have chosen the Re-Normalization Group Theory (RNG) modiﬁcation of the k-1 model for the 2D simulation of the cold crucible melting process. According to our previous numerical studies, it has delivered more accurate predictions about turbulence properties in the recirculated ﬂows than the standard model.

Experiment and numerical simulation of melt convection

The change in crucible diameter can save energy, reduce cost and improve efficiency. The trend of oxygen distribution obtained in calculations is in good agreement with experimental values. The present model can well predict the 400-mm-diameter silicon crystal growth and is essential for the optimization of furnace design and process condition.

NUMERICAL STUDY ON SUPPRESSION OF TSUNAMI WITH

Lee et al.[3] confirmed that the MPS method was reasonably applied to a numerical simulation of predicting the efficiency of floating-type breakwater interacting with waves. However, the effectiveness of under-sea breakwaters has not been investigated so far.

Numerical study on suppression of vortex

Numerical study on suppression of vortex-induced vibrations of box girder bridge section by aerodynamic countermeasures M.W. Sarwarn, T. Ishihara Department of Civil Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo

The Effect of Stepped Wall of the Graphite Crucible in

The numerical simulation confirmed that new crucible design to increase the solvent-crucible interface could definitely change the temperature distribution and increase the carbon concentration. The simulation result, SiC single crystals were grown with Si solvent at 1900C using a normal crucible and a stepped crucible to investigate the effect of crucible design having a stepped wall.

Extension of the k

Since the numerical simulation—in agreement with industrial practice and the experiments carried out—demonstrates good effective mixing of the entire flow region, there is thus a possibility for the simulation of aterial transport in the melt of induction crucible

Modern numerical methods and their applications in

Numerical Study on Suppression of Vortex Induced Vibration of Box Girder Bridge Section by Aerodynamic Countermeasures

Numerical Study on Suppression of Vortex Induced Vibration of Box Girder Bridge Section by Aerodynamic Countermeasures Muhammad Waheed SARWAR a, Takeshi ISHIHARA b Yozo FUJINO c a,b Institute of Engineering Innovation, School of Engineering

Direct numerical simulation of turbulent flow above

2018/10/25Further, the result for the zigzag riblet indicates stronger suppression of the near-wall vortices that produce the Q2 and Q4 events. 12 12. H. Choi, P. Moin, and J. Kim, " Direct numerical simulation of turbulent flow over riblets," J. Fluid Mech. 255, 503– 539