A panel based method for automatic optimization of aerodynamic surfaces using pressure based funtionals is presented, where a potential flow is used as a valid approximation of the attached flow passing an arbitrary body. The optimization is performed subject to the Stratford separation criterion and geometrical constraints, where a favourable pressure distribution that indirectly leads to a reduced drag represents the solution. The minimization of functionals is done using a sequential quadratic programming algorithm. The method is simple and has low computational demands. Its efficiency is demonstrated in three conceptually different test cases. In case of an optimization of a fairing, enclosing a human powered bicycle, the drag is reduced through a postponement of the transition from laminar to turbulent flow and the thinning of the boundary layer in the pressure recovery region. In case of a fairing of a wing-fuselage junction on an airplane, a minimal drag at the same amount of lift is obtained through an elimination of a massive root flow separation at moderate angle of attack, and in case of an optimization of a bulb keel of a sailboat, a favourable pressure distribution and consequently reduced drag is obtained simply through a smoother and on average slower flow passing the optimized surfaces.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 3266299Prof. Šarler was because of resounding publications of program group in the field of industrial use of meshless methods invited to edit a special issue of international journal Engineering Analysis with Boundary Elements and Other Mesh Reduction Methods.
C.03 Guest-associated editor
COBISS.SI-ID: 3352315Development of numerical modelling of electromagnetic direct chill casting of aluminium alloys is presented in final technical report for aluminium industry IMPOL Slovenska Bistrica. We have developed a numerical model of stress, temperature, velocity, concetration and microstructire field in round aluminium billets as a function of classsical and low-frequency electromagnetic process parameters. The numerical model entirely relies on meshless methodology, developed in program group. The new technology of low-frequency direct chill casting is in pilot operation in IMPOL Slovenska Bistrica company.
F.09 Development of a new technological process or technology
COBISS.SI-ID: 1066154Elite international conference on numerical solution of thermofluid problems has been organized at Bled lake. The proceedings have been published at Italian publisher Gianni Editore. Two special numbers of International Journal of Numerical Methods in Heat & Fluid Flow with selected papers from the conference are underway.
C.01 Editorial board of a foreign/international collection of papers/book
COBISS.SI-ID: 13500443We presented advantages of meshless methods over classical numerical methods in the invited lecture at DESY Hamburg research centre. We particularly focus on our local collocation method with radial basis functions. Based on the contents of the invited lecture, DESY Hamburg ordered 3.5 years long industrial research project of meshless numerical modelling of gas focused micro nozzles which are used in femtosecond crystallography.
B.04 Guest lecture
COBISS.SI-ID: 3116283