Modelling and Simulation for Optimum Design and Analysis of Riser in Sand Casting with Experimental Validation

2013 ◽  
Vol 465-466 ◽  
pp. 657-661 ◽  
Author(s):  
B. E. Narkhede ◽  
C.M. Choudhari ◽  
S.K. Mahajan
Keyword(s):  
Optimum Design ◽  
Experimental Validation ◽  
Hot Spot ◽  
Casting Process ◽  
Temperature History ◽  
Ansys Software ◽  
Software Developers ◽  
History Of ◽  
Transient Thermal ◽  
Good Agreement

Solidification of metals continues to be a phenomenon of great interest to physicists, metallurgists, casting engineers and software developers. It is a non-linear transient phenomenon, posing a challenge in terms of modelling and analysis. This paper attempts to study heat flow within the casting, as well as from the casting to the mould, and finally obtains the temperature history of all points inside the casting. The most important instant of time is when the hottest region inside the casting is solidifying. ANSYS software has been used to obtain the last solidifying region in the casting process by performing transient thermal analysis. Location of the hot spot predicted by software simulation showed good agreement with the experimental trial. It was also observed that the simulation of casting helps in obtaining optimum design of riser.

scholarly journals Simulation of lead Antimony Alloy Solidification and its Experimental Validation

2020 ◽  
Vol 9 (4) ◽  
pp. 68-72
Keyword(s):  
Direct Method ◽  
Research Work ◽  
Casting Process ◽  
Vital Role ◽  
Simulation Software ◽  
Temperature History ◽  
Alloy Solidification ◽  
Modeling And Analysis ◽  
Transient Thermal ◽  
Antimony Alloy

The solidification of metals continues to be a phenomenon of great interest to physicists, metallurgists, casting engineers, and software developers. It is a non-linear transient phenomenon, posing a challenge in terms of modeling and analysis. During the solidification of a casting in a mould, the heat-transfer between the casting and the mould plays a vital role. This paper attempts to study heat flow within the casting, as well as from the casting to the mould, and finally obtains the temperature history of some points inside the casting. The most important instant of time is when the hottest region inside the casting is solidifying. ProCAST software has been used to obtain the temperature distribution in the casting process by performing Transient Thermal Analysis. In this research work, solidification of lead-2wt%antimony alloy has been carried out in the different sizes of metallic mold to predict the formation of shrinkage during solidification. Theoretical results have been validated experimentally for a particular case of lead-2wt%antimony alloy solidification. Results obtained by simulation software are compared with the experimental reading of temperature and found to be in good agreement. Voids appeared at the top and isolated area of castings for the defect-free direct method used in this study.

Numerical Calculation on Steel Coil during Annealing Process

2011 ◽  
Vol 402 ◽  
pp. 472-475
Author(s):  
Chao Chen ◽  
De Gang Ouyang ◽  
Zhong Hua Song ◽  
Sheng Chen
Keyword(s):  
Mathematical Model ◽  
Annealing Process ◽  
Temperature Fields ◽  
Temperature History ◽  
Two Dimensional ◽  
Steel Coil ◽  
Cylindrical Coordinate ◽  
Calculation Results ◽  
History Of ◽  
Good Agreement

A two-dimensional mathematical model in cylindrical coordinate system was developed to simulate the temperature history of steel coil during annealing process. Based on finite difference method, the equations were calculated, and the temperature history of steel coil was obtained. Compared with experimental results, the calculation results are in good agreement with measurements. The temperature fields of steel coil at different time were analyzed, which can provide reference for optimizing of annealing process.

An Inverse Analysis Method for Estimation of Heat Flux and Temperature-Dependence of Heat Transfer Coefficient

2011 ◽  
Author(s):  
Shiro Kubo ◽  
Seiji Ioka
Keyword(s):  
Heat Transfer ◽  
Surface Temperature ◽  
Inverse Method ◽  
Thermal Stresses ◽  
Temperature History ◽  
Inner Surface ◽  
History Of ◽  
Transient Thermal ◽  
The Relationship ◽  
Inverse Analysis Method

Transient thermal stresses develop in pipes during start-up and shut-down. In previous papers the present authors [1–4] proposed an inverse method for determining the optimum thermal inlet liquid temperature history which reduced the maximum transient thermal stress in pipes. The papers considered multiphysics including heat conduction, heat transfer, and elastic deformation. The inverse method used the relationship between inner surface temperature history, transient temperature distribution and transient thermal stresses. The coefficient of heat transfer plays an important role in the evaluation of thermal stress. In this study an inverse method was developed for estimating heat flux and temperature-dependence of the coefficient of heat transfer from the history of the outer surface temperature and the liquid temperature. The method used the relationship between the outer surface temperature and the inner surface temperature. For the regularization of solution the function expansion method was applied in expressing the history of flux on the inner surface. Numerical simulations demonstrated the usefulness of the proposed inverse analysis method. By examining the effect of measurement errors of temperature on the estimation, the robustness of the method was shown.

Experimental Analysis of Journal Bearings Undergoing Oscillatory Motion

2007 ◽  
Author(s):  
Xiaobin Lu ◽  
Michael M. Khonsari
Keyword(s):  
Friction Coefficient ◽  
Thermal Field ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Oscillatory Motion ◽  
Temperature History ◽  
The Finite Element Method ◽  
History Of ◽  
Series Of Experiments ◽  
Good Agreement

A series of experiments is carried out on a grease-lubricated, heavy loaded journal bearing undergoing oscillatory motion to examine its thermal field. The history of temperature measurement and the friction coefficient are monitored. The finite element method is employed using ANSYS to simulate the temperature history with input of the friction coefficient result. Experiment and simulation show good agreement.

scholarly journals NUMERICAL SIMULATION OF TEMPERATURE DISTRIBUTION ON METAL CASTING IN VERTICAL SOLIDIFICATION

2018 ◽  
Vol 17 (2) ◽  
pp. 80
Author(s):  
G. M. Stieven ◽  
D. R. Soares ◽  
E. P. Oliveira ◽  
E. F. Lins
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Numerical Technique ◽  
Heat Transfer Process ◽  
Temperature History ◽  
Energy Liberation ◽  
Vertical Solidification ◽  
History Of ◽  
Two Phases ◽  
Good Agreement

The metals and alloys solidification can be defined as a transient heat transfer process. A liquid/solid transformation is followed by thermal energy liberation, with a movable boundary separating two phases with different thermophysical properties. The solidification is of great interest to mechanical and chemical engineers. It is a non-linear transient phenomenon, where heat transfer between the casting and the mold plays a important role. This paper aims to propose a study of heat flow from the casting to the mold using a numerical technique to compute the temperature history of all points inside the casting. The cooling process consists of water-cooled mold with heat being extracted only from the bottom, resulting in unidirectional vertical solidification. The ANSYS software was used to obtain the temperature distribution in the casting. Good agreement was obtained when the simulation results were compared with the experimental data.

scholarly journals Study on the Temperature Field of Casting Process in ANSYS

2011 ◽  
Vol 2-3 ◽  
pp. 856-860
Author(s):  
Chang Li ◽  
Guang Bing Zhao ◽  
Shu Yu Zhang ◽  
Xing Han
Keyword(s):  
Temperature Field ◽  
Casting Process ◽  
Interface Temperature ◽  
Field Change ◽  
Ansys Software ◽  
Heat Process ◽  
Manufacture Process ◽  
Composite Interface ◽  
Non Linear ◽  
Changing Process

Cast molding is the main manufacture process in foundry, because the most disfigurements occurs in this step, while the foundry itself is a complex non-linear instantaneous transferring heat process, in which it should take the absorbing and releasing potential heat into account. In this paper, it simulates the temperature field changing process of the cast solidification in ANSYS software, gets the temperature field change rule for a typical cast, and analyzed the effect of different foundry technics parameters on composite interface temperature, which will provide numerical bases for optimizing foundry technics parameters in future.

Analysis of Tempering and Rehardening for Grinding of Hardened Steels

1991 ◽  
Vol 113 (4) ◽  
pp. 388-394 ◽  
Author(s):  
O. B. Fedoseev ◽  
S. Malkin
Keyword(s):  
Thermal Properties ◽  
Heat Source ◽  
Hardened Steel ◽  
Temperature History ◽  
Hardness Distribution ◽  
Temperature Dependent ◽  
Thermally Activated ◽  
Reaction Equations ◽  
Rate Controlling Step ◽  
Good Agreement

An analysis is presented to predict the hardness distribution in the subsurface of hardened steel due to tempering and rehardening associated with high temperatures generated in grinding. The grinding temperatures are modeled with a triangular heat source at the grinding zone and temperature-dependent thermal properties. The temperature history, including the effect of multiple grinding passes, is coupled with thermally activated reaction equations for tempering and for reaustenitization which is the rate controlling step in rehardening. Experimental results from the literature are found to be in good agreement with the analytical predictions.

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