71 results about "Solid region" patented technology

An orthopaedic screw having a plurality of regions, at least one of which may be porous. The orthopaedic screw includes a head, a tip and at least one thread. The porosity of the screw of the present invention can vary within the part or region, including changes in pore shape, size and density. These characteristics can vary along the length of the screw axis and/or radially (from the outer diameter to the axis). The orthopaedic screw may further include at least one solid region formed of any implantable polymer, reinforced polymer or metal.

A transparent aluminum oxynitride product is produced by a first heat treating step wherein a combination of Al₂O₃ and AlN at a temperature within the solid-liquid phase and a second step of sintering the heat treated combination at a temperature at least 50° C. less than the heat treating temperature. The method introduces a small fraction of liquid that aids in pore elimination and densification. In a single step, the material is shifted from the liquid/solid region into a solid AlON solution region, wherein the liquid is fully reacted with the solid AlON phase, with further sintering occurring. The procedure is sufficient to eliminate voids and other imperfections which often result in a reduction in optical clarity.

The present invention relates to a device for converting a liquid feed stream to a gaseous vapor stream comprising: (a) channel means having a first and second end, said channel means having a plurality of channels connecting said first and second end, said channel means having a substantially solid region and a void region, (b) inlet means for directing the liquid feed stream to the first end of the plurality of channels, and (c) outlet means for directing the gaseous vapor stream from said plurality of channels, where said channels have, at any distance d between the inlet and outlet, a geometric configuration, perpendicular to the feed flow direction, wherein the average void fraction ranges from about 0.3 to about 0.95.

This invention pertains to a glass fiber, a Raman device and a method. The fiber is a hollow core photonic bandgap chalcogenide glass fiber that includes a hollow core for passing light therethrough, a Raman active gas disposed in said core, a microstructured region disposed around said core, and a solid region disposed around said microstructured region for providing structural integrity to said microstructured region. The device includes a coupler for introducing at least one light signal into a hollow core of a chalcogenide photonic bandgap fiber; a hollow core chalcogenide photonic bandgap glass fiber; a microstructured fiber region disposed around said core; a solid fiber region disposed around said microstructured region for providing structural integrity to said microstructured region; and a Raman active gas disposed in the hollow core. The method includes the steps of introducing a light beam into a hollow core chalcogenide photonic bandgap glass fiber filled with a Raman active gas disposed in the core, conveying the beam through the core while it interacts with the gas to form a Stokes beam of a typically higher wavelength, and removing the Stokes beam from the core of the fiber.

The invention discloses a multi-field coupling transient numerical method for hypersonic flow-heat transfer and structural response. The method comprises the following steps of: determining wall temperature and displacement boundary condition according to structure, performing data exchange at a fluid-solid coupling interface, and obtaining the current temperature and displacement boundary condition; simultaneously solving coupled solution format of each preset conservation equation to obtain the current heat flux and pressure; performing data exchange at the fluid-solid coupling interface to obtain the boundary condition of a solid region; according to the boundary condition of the solid region, solving out the wall temperature and structure displacement through a thermal mechanical unity coupling method; and executing the steps above repeatedly until meeting a preset stop condition. Using the method provided by the invention, multi-field coupling calculation where a hypersonic non-equilibrium flow solver and a structural thermal/mechanical unity coupling solver are coupled is realized, prediction on pneumatic thermodynamic environment and structural thermodynamic response of a hypersonic aircraft meets physical reality better, and calculation precision can be guaranteed.

An apparatus which serves as a single utensil allowing to gradually adjust vapor escape, liquid drainage speed, and particle drainage and filtering. A few of the apparatus applications are cooking utensils, pitchers, drinking cups, gardening watering and fertilizing cans, etc. The apparatus comprises a vessel having pouring regions and a lid having draining and solid regions. In use, the solid regions of the lid must be aligned with the vessel pouring regions, which is the non-straining or opened position with no vapor release. If the lid is rotated in either direction, it slides into a locking engagement with the vessel until the desired draining regions of the lid are aligned with the vessel pouring regions. This is the straining or locked position where a desirable degree of steam or liquid and particles can be released.

The invention discloses a direct fluid-solid coupling heat transfer analysis method for an engine cooling water jacket. The method comprises the following steps: 1, establishing a solid domain and a fluid domain parametric geometric model; 2, carrying out grid partition and grid quality inspection; 3, defining material attributes; 4, defining boundary conditions; 5, defining a coupling heat transfer interface; 6, setting solver parameters; 7, carrying out direct fluid-solid coupling heat transfer analysis considering boiling heat transfer and obtaining calculation results. The method can compensate for the inability to effectively evaluate the heat transfer process and the coolant flow condition between the solid region and the fluid region in a conventional engine cooling water jacket design process, and the method avoids the risk of cracking failure caused by the high temperature of the bridge area of the cylinder head fire surface.

The invention discloses a temperature field simulated analysis method applied to a multi-disk dry brake under the comprehensive action of multiple physical fields. Firstly, a three-dimensional model of the brake is established by starting from the mechanism and movement principle of the multi-disk dry brake. Then according to the complementarity between a fluid field and the brake structure, a rough fluid model is established and then modified and cut, and thus a final fluid model is acquired. Then fluid region and solid region boundary conditions are computed, a heat-flux coupling analysis is performed, and a temperature distribution rule of the whole brake is acquired. At last, a thermo-solid coupling analysis is performed, and a temperature field-to-brake structure deformation parameter is acquired. The temperature field simulated analysis method can achieve the temperature field simulated analysis of the multi-disk dry brake under the comprehensive action of multiple physical fields, is more accurate and reliable than the traditional single temperature field analysis, adopts zonal solving and boundary coupling methods, thus optimizing the information flow among the physical fields, and thus, the simulation is simpler, the operation is convenient and the consumed time is greatly shortened.

A multi-phase hygienic cleansing system and skin care device, comprising an inter-related network of cleansing features defined by an openweave fabric attached to a cloth, wherein the openweave fabric is further structurally defined by a plurality of essentially tightly-woven or solid fabric regions interspersed in a grid-like arrangement about a plurality of openings, such that the tightly-woven or solid fabric regions function to absorb moisture and dirt, and to visually identify successful cleansing, such that the grid-like arrangement of the openings proximate the solid regions function to exfoliate and scrub, and such that the plurality of openings function to receive particulate matter and dead skin debris from the cleansing surface, removing same from risk of reapplication to the body.

A method for minimizing cross-process non-uniformities in solid and heavy shadow regions of printed documents is provided. The method includes marking with a marking engine an image on an image bearing surface moving in a process direction; generating profile data of the image by sensing an optical characteristic of the image in a cross-process direction; adjusting at least one control actuator of the marking engine so as to shift the characteristic of a subsequent marked image in the cross-process direction to at least a target value; and generating a spatially varying tone reproduction curve to smooth the characteristic of the subsequent marked image towards the target value.

The invention provides a sulfur high-birefringence photonic crystal fiber in the waveband range from 2 micrometers to 5 micrometers. An elliptical air hole is absent in a hexagonal lattice photonic crystal structure to form the sulfur high-birefringence photonic crystal fiber. The sulfur high-birefringence photonic crystal fiber comprises a fiber core and cladding. The fiber core and the claddingare positioned on a fiber background material, the cladding is of a hexagonal lattice elliptical air hole array structure, the hexagonal lattice elliptical air hole array structure comprises four outer first elliptical hole systems and inner second elliptical hole systems, the first elliptical hole systems comprise concentric hexagons, and the fiber core is a solid region in the center of the fiber background material. The sulfur high-birefringence photonic crystal fiber has the advantages that light fields in the sulfur high-birefringence photonic crystal fiber are restrained by the claddingwith multiple types of elliptical air hole structures, accordingly, the problem of required long lengths of common polarization maintaining fibers can be solved, the shortcoming that silicon-dioxide-based high-birefringence fibers only can work in near infrared wavebands can be overcome, and complicated fiber core doping technologies can be omitted.

The invention discloses a simple finite element modeling method for a composite stiffened skin-foam sandwich structure. The method comprises the steps that 1, a three-dimensional entity model is established; 2, the three-dimensional entity model is partitioned to obtain a foam entity area and an interface; 3, a layer of shell area is established on the interface, composite properties are given to the shell area, and foam material properties are given to the foam entity area; 4, meshing is performed on the shell area and the foam entity area; 5, boundary conditions are set; and 6, submission is performed for calculation. The improved simple finite element modeling method for the composite stiffened skin-foam sandwich structure is proposed creatively, the modeling workload is greatly reduced, coupling calculation precision is effectively improved, and therefore the stress transmission effect and the strain transmission effect between finite element model nodes are improved.

The invention discloses a multi-disciplinary optimization design method, device and equipment for a multistage axial flow expander, and relates to the technical field of expander designs. The method comprises the steps: firstly carrying out the forward modeling of the multistage axial flow expander according to design parameters solved through reverse fitting, and obtaining a target model; defining corresponding boundary conditions for the fluid region model and the solid region model after grid division, calculating the fluid region model by using a CFD module, and performing multidisciplinary calculation on the solid region model by using a multidisciplinary calculation module containing strength, dynamic characteristics and the like; and finally, according to a plurality of target functions of the CFD calculation result and the multidisciplinary calculation result, performing multi-target optimization on two stages of blade grids in the multistage axial flow expander by using a genetic algorithm to obtain a forward bending and backward bending coupling rule of the blade and optimization information of distribution of the blade profile along the blade height. The multi-disciplinary optimization design of the multi-stage axial flow expander can be effectively carried out.

The invention provides a research method for the fuel oil liquid drop evaporation process in a porous medium model structure. The method includes the steps that Gambit software is used for constructing three model structures (including aligned arrangement and interleaved arrangement structure porous medium models instead of a porous medium model), corresponding grids are drawn, and wall surface attribute in the models as well as a fluid region and a solid region are set; grid files of the three kinds of models manufactured by Gambit are guided into Fluent software, and calculation method in the three models and the physical property parameters of fuel oil liquid drops are set by the Fluent software and calculated respectively, and then the fuel oil liquid drop evaporation processes in the three kinds of models are compared to obtain a mass fraction distribution cloud picture of the fuel oil liquid drops. The distribution rule of the mass fraction of the fuel oil liquid drops can be researched and analyzed, which is of great significance in further improving fuel combustion efficiency, reducing pollutant emission and researching and developing a new porous medium model.

The invention discloses a fluid-solid coupling method for the opening process of a pressure release valve of a pressure stabilizer. The fluid-solid coupling method comprises the following steps: establishing a simplified geometric model of a safety valve of the pressure stabilizer; respectively carrying out mesh generation on the solid region and the fluid region of the safety valve of the voltagestabilizer to obtain a mesh model of each part; controlling the stress state of the valve to be changed from a closed state to an open state through a user-defined function; carrying out steam flow characteristic calculation in the pressure stabilizer pressure release valve fluid domain grid model range, and carrying out solid mechanical vibration behavior calculation in the solid domain grid model range; achieving bidirectional coupling calculation of the same time step length of the mechanical behavior and the grid displacement through a fluid-solid coupling platform; and adopting a fluid-solid coupling platform is adopted to achieve dynamic flow field analysis inside the pressure release valve of the pressure stabilizer and mechanical behavior analysis of a solid region.