The objective of this paper is to study the effect of an unsteady moving heat source on the aerodynamic performance of an NACA 0012 airfoil section, with particular focus on the lift and drag coefficients. The compressible Navier–Stokes equations are solved using a finite volume method as well as Spalart-Allmaras Model for turbulence simulation. The heat source periodically moves over the lower...

Dual scattering channel schemes extend the transmission line matrix numerical method (Johns’ TLM algorithm) in two directions. For one point, transmission line links are replaced by abstract scattering channels in terms of paired distributions (characteristic impedances are thus neither needed, nor in general defined, e.g.). In the second place, non-trivial cell interface scattering is admitted...

A comprehensive numerical investigation of long-term operation Ground-Sourced Heat Pumps through Borehole Exchangers is presented. Thermal fluxes between systems are analyzed a semi-analytical method based on line source models. Operation points geothermal and backup determined by an hourly-based non-linear constrained optimization. Simulations 12-buildings neighborhood demonstrated that middle...

The aim of the performed work is to establish the 2D and 3D model of direct unsteady task of sample heat treatment by moving source employing computer model on the basis of finite element method. Complex boundary condition on heat loaded sample surface is the essential feature of the task. Computer model describes heat treatment of the sample during heat source movement over the sample surface....

kurdistan rasa grape is one of the delicious and sweet fruits with black color. it contains vitamins e, c and some protectors such as antioxidants. in order to design equipments and facilities for drying, preservation and processing of rasa grape, it is necessary and important to know about its specific heat and thermal conductivity. in this paper the specific heat and thermal conductivity of r...

This paper describes a method for the retrieval of discontinuous heat sources involved in a metal cutting process. Two smoothing techniques were used in the present study in order to smooth noisy sensor data recorded by temperature sensors. The two smoothing techniques are a least squares polynomial t and a La-grangian smoothing. These data are then used to recover the heat source. It is found ...

The paper shall demonstrate how concentrated source terms can be included by Delta functions in models with distributed parameters and, moreover, that the abstraction of sharply concentrated quantities leads to decisive numeric advantages. The system of differential equations loses its stiffness here at the method of lines. The eigenvalues of the Jacobian matrix (A-matrix) show that it becomes ...