In the present study, numerical simulations of the ow in a three-dimensional axisymmet-ric poppet valve are conducted using a vortex method. The uids are assumed inviscid and incompressible. The vibration of the poppet, supported by a spring and a dash pot, occurs in the axial direction in some range of parameters. The numerical simulations are carried out by varying systematically the paramete...

In this paper, we derive a model for the two-phase freezing process of supercooled uids. Especially, we take density changes along the phase interfaces into account. Thus, besides heat diiusion and the interface phenomena, mass transport and convection in the uid phase which is given by the full Navier{Stokes equations has to be considered. For the 2D case we implemented an algorithm for the nu...

This paper is devoted to the low Mach number limit of weak solutions to the compressible Navier-Stokes equations for isentropic uids in the whole space R d (d = 2 or 3). This problem was investigated by P.L. Lions and N. Masmoudi 19]. We present here a diierent approach based upon Strichartz' estimates for the linear wave equation like in 21] in the inviscid case, which improves the convergence...

loss of 10 kg over the last year. She reported helping the passage of the food bolus through the subcutaneous presternal digestive conduit with her ngers. A thick-paste barium transit study revealed multiple diverticular pouches in the neoesophagus, with retained contrast material inside of them. No other reason for the weight loss was identi ed. As the dysphagia in this case seemed not to be w...

Combined analysis of high-resolution seismic images of the Alaska and Cascadia subduction zones reveals where metamorphic fl uids are released. Both images show the subducted oceanic crust as a dipping low-velocity layer with a clear termination depth. However, in Alaska the crust is thicker (15–20 km compared to 8 km) and terminates at greater depth (120 km compared to 40 km) than in Cascadia....

A strategy to target functionalized quantum dot-liposome (f-QD-L) hybrid vesicles in the solid tumor tissue of tumor-bearing mice is explored. Functionalized polyethylene glycol (PEG)-lipid coated QD (f-QD) were encapsulated into the aqueous core of 100 nm cationic (DOPC:Chol: DOTAP); sterically stabilized, fluid-phase (DOPC:Chol:DSPE-PEG2000); and sterically stabilized, gel-phase (DSPC:Chol:DS...

In Palaeozoic rocks of South-eastern Bosnia (SEB) there are numerous, but very small vein and replacement barite ore deposits containing up to 10% Pb-Zn-Fe-Cu sulphides. Their geochemical characteristics are compared with large barite monosulphide (Hg-tetrahedrite) ore deposits in Mid-Bosnian Schist Mountains (MBSM). The 87Sr/86Sr isotope ratios in the barites of both areas are very similar, (0...