Now that we understand how to use the information given to us, now we can apply it to sample problems. The form of the equation below follows for any thermodynamics problem involving chemical reactions;ΔHrxn=ΣΔHproducts –ΣΔHreactantsRecall that sigma (Σ) is used for the mathematical...
Indirectly, the Newtonian theory also defines the aerodynamic shadow of any aerodynamic body moving with a high angle of incidence. Since the classic theory does not consider the existence of a bow shock or the impinged forebody with a longitudinal radius of curvature, some attempts have been m...
Ayappa, A fixed-grid finite element based enthalpy formulation for generalized phase change problems: Role of superficial mushy region, Int. J. Heat Mass Transfer 45 (24) (2002) 4881-4898.Madhuchhanda Bhattacharya, Tanmay Basak, K.G. Ayappa, A fixed-grid finite element based enthalpy ...
is another aspect for the sluggish kinetics. Moreover, MgO layer is often inevitably formed on the surface of the Mg particles which prevents hydrogen atoms from penetrating into the Mg core[15]. To solve the problems above, strategies for designing the Mg/MgH2system can be surmised as follow...
The starting solutions for two-dimensional heat conduction problems with phase change A short-time closed-form solution is developed for two-dimensional heat conduction problems with change of phase for a half-space. The heat is applied in such a manner that melting starts at a point of the su...
The numerical study of solid/liquid phase change problems represents a large and ongoing field of research with many applications. These simulations should run as fast and accurately as possible. Therefore, proceeding from previous work and findings from the literature, this study investigates enthalpy...
Accurate solutions of moving boundary problems using the enthalpy method. Int. J. Heat Mass Transf. 1981, 24, 545–556. [Google Scholar] [CrossRef] Coen, V.; Goossens, L.; van Hooreweder, B. Methodology and experimental validation of analytical melt pool models for laser powder bed fusion...
By this technique, validation is performed by randomly generating training sets with sample repetitions and then evaluating the predicted responses of the samples not included in the training set. This work usually repeated thousands of times. After 5000 times repetition of this technique, the ...
The film was mainly represented by two immiscible components—a glass phase, which was close in elemental composition to SiO2, and solutions in the CaSi2O5–CaTiSiO5 system. The oxide layer contained rounded grains derived from the unoxidized TixMo1−xSi2 phase with sizes of 1 to 80 μm ...