Abstract Thermoacoustic properties of can-annular combustors are commonly investigated by means single-can test-rigs. To obtain representative results, it is crucial to mimic can–can coupling present in the full engine. However, current approaches either lack a solid theoretical foundation or not practicable for high-pressure rigs. In this study, we employ Bloch-wave theory derive reflection co...

In the present study, turbulent flow field and heat transfer in a single started helically ribbed pipe with discontinuous rib are investigated. A large-eddy simulation (LES) technique is applied section cyclic boundary conditions. The aim of this study to explain further analyze findings from measurements at such complex structures help detailed simulations. results validated Reynolds number Re...

In this paper, we construct a highly simplified mathematical model for studying the problem of conjugate heat transfer in gas turbine blades and their cooling ducts. Our simple focuses on relevant coupling structures aims to reduce unrelated complexity as much possible. Then, apply port-Hamiltonian formalism its subsystems investigate interconnections. Finally, spatial discretization system pro...

Using of nanofluids and ducts with corrugated walls are both supposed to enhance heat transfer, by increasing the heat transfer fluid conductivity and the heat transfer area respectively. Use of a diverging duct with a jet at inlet section may further increase heat transfer by creating recirculation zones inside the duct. In this work two-dimensional incompressible laminar flow of a nanofluid e...

BACKGROUND In numerous Caudata, the testis is known to differentiate new lobes at adulthood, leading to a multiple testis. The Iberian ribbed newt Pleurodeles waltl has been studied extensively as a model for sex determination and differentiation. However, the evolution of its testis after metamorphosis is poorly documented. METHODS Testes were obtained from Pleurodeles waltl of different age...

To investigate the mechanism of wave trapping, acoustic embedded trapped modes associated with two-resonant-mode interference in two-dimensional duct–cavity structures are calculated by feedback-loop closure principle, which allows us to analyze traveling that construct modes. The exact two coexisting resonant underpin an mode a cavity open semi-infinite ducts numerically demonstrated. At inter...

symptomatic mullerian duct cysts are uncommon. a young adult male presented to us with a palpable supra-pubic mass, pain and lower urinary tract symptoms. initial imaging modalities showed a large cystic lesion in the pelvis with a non-visualized right kidney. a short, blind ending right ureter on retrograde pyelography added to the confusion. on exploration, the lesion was noted to be separate...

This paper presents a method to identify wave equations’ parameters using dispersion characteristics (k-space) on two-dimensional domains. The proposed approach uses the minimization of difference an analytic formulation relation wavenumbers calculated from solution fields. implementation partial differential equations (PDE) resolution finite element software is explained and tested with soluti...

Most of the concrete volume in multistorey buildings is cast solid slabs, which are frequently flat slabs supported on columns. By using two-way spanning ribbed consumption could be significantly reduced. However, due to high costs associated with formwork, such a complex rib configuration rarely used nowadays. With advent technologies for automated formwork fabrication, material-saving potenti...