A new baseline for the Newtonian thermal analysis of casting: two-capacitive system baseline Modeling the effects of the thermal capacity of mold

Date

2015-01-01

Author

Erbas, Kadir Can

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

182
views

0
downloads

Computer-aided cooling curve thermal analysis for the casting process is usually applied to predict the latent heat of transformation and the solid fraction. In this study, one of the important limitations of the Newtonian thermal analysis for the prediction of the latent heat was determined as the disregard of the thermal capacity of mold. Therefore, a new baseline technique, two-capacitive system baseline (TCSBL), was developed by taking the thermal capacity of the mold into account. This new method was modeled by considering the analogy between RC circuits and the metal-mold thermal capacitance system. It was improved by a Taylor series expansion approach to express the cooling rates in terms of the metal and mold temperatures. Ten experiments with four types of pure metals were undertaken to compare the latent heat results of TCSBL with the Newtonian and Dynamic Baselines (NBL and DBL). The mean percentage error for the latent heat prediction of TCSBL, NBL, and DBL were calculated as 4.3, 29, and 24 %, respectively, in comparison with the literal value of the latent heats.

Subject Keywords

Thermal Analysis, Latent Heat, Solid Fraction

URI

https://hdl.handle.net/11511/63602

Journal

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

DOI

https://doi.org/10.1007/s10973-014-4143-2

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

A numerical study of single-phase convective heat transfer in microtubes for slip flow Sun, Wei; Kakac, Sadik; Yazicioglu, Almila G. (2007-11-01) The steady-state convective heat transfer for laminar, two-dimensional, incompressible rarefied gas flow in the thermal entrance region of a tube under constant wall temperature, constant wall heat flux, and linear variation of wall temperature boundary conditions are investigated by the finite-volume finite difference scheme with slip flow and temperature jump conditions. Viscous heating is also included, and the solutions are compared with theoretical results where viscous heating has been neglected. For ...
A two-energy equation model for dynamic heat and mass transfer in an adsorbent bed using silica gel/water pair Solmus, Ismail; Rees, D. Andrew S.; Yamali, Cemil; Baker, Derek Keıth (2012-09-01) In this study, the influence of the adsorbent bed dimensions, convective heat transfer coefficient between the cooling fluid and adsorbent bed and the thermal conductivity of the solid adsorbent material on the transient distributions of the solid and gas phase temperature difference, differences in the adsorbate concentration predicted by the instantaneous equilibrium and linear driving force (LDF) models, solid phase temperature, gas pressure and adsorbate concentration inside the adsorbent bed of a solid...
A CSCM approximation of steady MHD flow and heat transfer between parallel plates with hydrodynamic slip and convective boundary conditions Tezer, Münevver; Türk, Önder (null; 2019-10-04) The steady magnetohydrodynamic (MHD) flow together with its heat transfer between parallel plates is considered in which the electrically conducting fluid has temperature dependent properties such as viscosity, thermal and electrical conductivity. The fluid is driven by a constant pressure gradient, and a uniform external transverse magnetic field is applied perpendicular to the plates. The effects of viscous and Joule dissipations are considered in the energy equation, and the fluid is assumed to be slippi...
Enhanced thermal conductivity of nanofluids: a state-of-the-art review Özerinç, Sezer; Yazicioglu, Almila Guevenc (2010-02-01) Adding small particles into a fluid in cooling and heating processes is one of the methods to increase the rate of heat transfer by convection between the fluid and the surface. In the past decade, a new class Of fluids called nanofluids, in which particles of size 1-100 nm with high thermal conductivity are Suspended in a conventional heat transfer base fluid, have been developed. It has been shown that nanofluids containing a small amount of metallic or nonmetallic particles, Such as Al2O3, CuO, Cu, SiO2,...
A numerical study on magneto-hydrodynamic mixed convection flow Bozkaya, Canan (2014-01-01) This paper, describes a study conducted to numerically investigate the two-dimensional, steady, laminar, magneto-hydrodynamic mixed convection flow and heat transfer characteristics in a lid-driven enclosure beneath an externally applied magnetic field. A solid square block is placed inside the cavity. The governing equations in the form of a stream function-vorticity-temperature formulation are solved numerically using the dual reciprocity boundary element method with constant elements. Treatment of nonlin...

Citation Formats

K. C. Erbas, “A new baseline for the Newtonian thermal analysis of casting: two-capacitive system baseline Modeling the effects of the thermal capacity of mold,” JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, pp. 183–189, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63602.