Cavity Shape Research Articles

Numerical Analysis of Factors Influencing the Ground Surface Settlement above a Cavity

In this study, ground stability was evaluated through vertical displacement distribution and surface settlement results. In particular, a finite element analysis was conducted considering various factors (namely, cavity type and area, traffic load, pavement thickness, and elastic modulus) that affect a road above a cavity. The aim of this study was to evaluate the effect of pavement layer and traffic load condition on surface settlement according to the cavity shape. Field measurement results were analyzed and compared with the results of previous studies to verify the reliability of the numerical analysis method applied herein. After performing the numerical analysis using the verified method, ground stability was evaluated by analyzing the underground mechanical behavior of a road above a cavity. To this end, the correlations among the vertical displacement distribution, surface settlement, and influencing factors obtained from the analysis results were analyzed. In the numerical analysis, the ground was simulated with a hardening soil model based on the elastoplastic theory. This mechanical soil model can accurately reproduce the behavior of actual ground and can closely represent the mechanical behavior of the soil surrounding a cavity according to the cavity generation. In addition, the elapsed time was not considered when applying a load on the pavement layer, and a uniformly distributed load was applied. Consequently, it was found that, with increasing cavity area and traffic load and decreasing pavement thickness and elastic modulus, the vertical displacement and maximum surface settlement above the cavity increased, and the reduction in ground stability was greater. Furthermore, the reduction in ground stability was greater when the cavity was rectangular than when it was circular.

Motion characteristics simulations of supercavitating vehicle based on a three-dimensional cavity topology algorithm

The maneuvering motion of a supercavitating vehicle pitching and yawing inevitably occurs when navigating in three-dimensional space. In order to give some insights into design of underwater vehicles, the maneuvering motion in the longitudinal and horizontal planes is investigated in this paper. Considering the definition of multi-body coordinate frames, a three-dimensional cavity topology model is proposed to predict the development of the shape of cavity and interact with the supercavitating vehicle in the simulations. Based on the cavity model, an improved planning model is established to calculate the necessary critical parameters of the planning force. According to the mathematical model above, a numerical algorithm is developed to simulate the maneuvering motion of the supercavitating vehicle. The higher algorithm efficiency is validated by the relative error of 10% order of magnitude and the more stable performance. The real-time scene figures and time-varying curves of the dynamic characteristics are obtained through the developed algorithm to study the influence of fins deflection on the maneuvering motion. The developed algorithm is validated to some extent to be a better alternative than the empirical one and provides a new method for analyses of simulation results of supercavitating vehicles.

MORPHOLOGICAL MEASURES OF SCAPULA IN SOUTH INDIAN POPULATION USING CT

Introduction: An immense knowledge about the shape of the glenoid cavity is necessary for TSA. This study aims to evaluate the dimension of the glenoid cavity and to compare the morphological measures of scapula between genders. Materials and methods: A total of 32 males and 32 females were selected for the shoulder scan and the measurements were taken in 2D axial plane and 3D reconstructed images. Statistical analysis was done using SPSS Version 21.0. [Formula: see text] 0.05 was taken as significant. Result: Out of five diameters that we considered in this study, the superior–inferior (SI) mean glenoid diameter is 33.09 ± 3.82 mm. The anterior–posterior average glenoid diameters AP1, AP2, AP3 and AP4 are 15.08 ± 3.03 mm, 18.12 ± 3.26 mm, 21.03 ± 2.41 mm, 22.1 ± 2.54 mm, respectively, in total population. Six angles were considered, the Axis of glenoid, Axis of scapula, Axis of humeral head, axis of the glenoid neck, Resch angle and version of glenoid, measured 132.51[Formula: see text]± 5.46[Formula: see text], 43.03[Formula: see text]± 5.04[Formula: see text], 132.44[Formula: see text]± 5.04[Formula: see text], 58.48[Formula: see text]± 6.42[Formula: see text], 72.92[Formula: see text]± 4.79[Formula: see text], − 5.21[Formula: see text]± 1.45[Formula: see text], respectively, for the total population. The specific cut-off points for SI, AP1, AP2, AP3 and AP4 are 35, 15.35, 18.1, 21.55 and 22.65, respectively. Conclusion: The morphological measures such as Axis of glenoid, Axis of humeral head, Resch angle and Axis of scapula show that there exists a statistically significant difference between two genders. Hence, these four measures have a vital role in gender identification of an unknown scapula. All the diameters in this study have got specific cut-off points and it will be most useful to discriminate the gender from an unknown scapula.

Study on the monitoring method of cavity growth in underground coal gasification under laboratory conditions

The growth state of the combustion cavity during underground coal gasification (UCG) affects the gasification process's efficiency, stability, and accurate monitoring and control. In this study, a simulation experiment of UCG was performed, and a horizontal coaxial gasification channel was drilled based on the constructed artificial coal seam. Oxygen and air are used as gasification agents to provide a sufficient temperature field to sustain the gasification process. Moreover, the derivation of the gasification zone during UCG was developed using stratified temperature monitoring and acoustic emission damage monitoring. After the experiment, the artificial coal seam was cut to obtain the profile shape of the combustion cavity, which was compared with the temperature and acoustic emission monitoring results. The results show that the temperature distribution results in the coal seam and the calibration results of the acoustic emission source during horizontal coaxial UCG are consistent with the two-dimensional and three-dimensional combustion cavities reconstructed by the profile. Thus, the effectiveness of stratified temperature monitoring and acoustic emission monitoring to infer the gasification combustion cavity is proven.

Comparative performance of various susceptor materials and vertical cavity shapes for selective microwave hybrid heating (SMHH)

The microwave processing of materials is gaining popularity over the past decade due to its unique heating abilities. The microwave hybrid heating (MHH) technique has effectively processed bulk metallic materials. MHH is assisted by susceptor material which forces metals to absorb microwave radiations. Further, MHH is modified to selective microwave hybrid heating (SMHH) to increase the efficiency of the process. This work examines the performance of Graphite and Charcoal susceptors with a conical vertical cavity for SMHH using FEM simulation. It is observed that the maximum temperature achieved by Graphite was 215 °C at an exposure time of 300 s, whereas, for Charcoal susceptor, it is 655 °C. Further, the effect of different vertical cavity shapes (cylindrical and conical) on the SMHH technique is presented for Charcoal susceptor. For an exposure time of 300 s, the temperature rise in the conical and cylindrical cavity is 655 °C and 319 °C, respectively. From resistive heat flow, time-temperature profile and temperature distribution, it is clear how SMHH is significantly effective for a conical vertical cavity having Charcoal susceptor. In addition, the performance of the conical vertical cavity having Charcoal susceptor was validated through experimental study. The real-time temperature profile was determined through testo 885/testo 890 thermal imaging camera. The observed maximum temperature of the susceptor after heating for 300 s was 639.9 °C.

Dimples, jets and self-similarity in nonlinear capillary waves

Numerical studies of dimple and jet formation from a collapsing cavity often model the initial cavity shape as a truncated sphere, mimicking a bursting bubble. In this study, we present a minimal model containing only nonlinear inertial and capillary forces, which produces dimples and jets from a collapsing capillary wave trough. The trough in our simulation develops from a smooth initial perturbation, chosen to be an eigenmode to the linearised ${O}(\epsilon )$ problem ( $\epsilon$ is the non-dimensional amplitude). We explain the physical mechanism of dimple formation and demonstrate that, for moderate $\epsilon$ , the sharp dimple seen in simulations is well captured by the weakly nonlinear ${O}(\epsilon ^3)$ theory developed here. For $\epsilon \gg 1$ the regime is strongly nonlinear, spreading surface energy into many modes, and the precursor dimple now develops into a sharply rising jet. Here, simulations reveal a novel localised window (in space and time) where the jet evolves self-similarly following inviscid (Keller & Miksis, SIAM J. Appl. Maths, vol. 43, issue 2, 1983, pp. 268–277) scales. We develop an analogy of this regime to a self-similar solution of the first kind, for linearised capillary waves. Our first-principles study demonstrates that, at sufficiently small scales, dimples and jets can form from radial inward focusing of capillary waves, and the formation of this may be described by a relatively simple model employing (nonlinear) inertial and capillary effects. Viscosity and gravity can, however, significantly influence the focusing process, either intensifying the singularity or weakening it (Walls et al., Phys. Rev. E, vol. 92, issue 2, 2015, 021002; Gordillo & Rodríguez-Rodríguez, J. Fluid Mech., vol. 867, 2019, pp. 556–571). This leads, in particular, to critical values of Ohnesorge and Bond numbers, which cannot be obtained from our minimal model.

Numerical Simulation on Optimization of Process Parameters for Free Bending of Metal Tubes

Three-dimensional free bending is a new tube forming technology with continuous variable curvature. In order to improve the forming quality of tube, this paper studies the principle of three-dimensional free forming system and the numerical calculation of bending moment in detail, and it uses the finite element simulation to model the mechanism in the bending process. The simulation model is used to simulate the forming process of copper tube, and the influence of key process parameters on the forming process is analyzed,the shape of the inner cavity of the bending die and the gap between the tube and the bending die are studied, the distance between the bending die and the guide column is studied, the axial feed rate on the forming quality of tubular bending parts has also been studied. The optimum process parameters were determined by finite element simulation and analysis.

Influence Rule of Projectile Density on the Characteristics of High-Speed Water-Entry Cavity

There has been much recent research on high-speed projectiles entering water, but research on the selection of the material for supercavitating projectiles is limited. Some important properties of such projectiles—mass and moment of inertia, for example—are related to the material density, so the projectile’s density has an important effect on the performance of the supercavitating projectile. This study, using Ansys fluent 19.0 simulation software, studied the details of water entry of four high-speed projectiles of the same shape but made of different materials: aluminum (2.7 g/cm3), steel (7.85 g/cm3), brass (8.5 g/cm3), and tungsten alloy (17.5 g/cm3). The cavity shape, ballistic and hydrodynamic characteristics, and cavity flow field characteristics of projectiles with different densities were analyzed for a water-entry velocity of 600 m/s. The results show that within 3 ms, the velocity of a projectile with a density of 2.7 g/cm3 drops to 171.8 m/s, and the velocity of a projectile with a density of 17.5 g/cm3 drops to 433.1 m/s. Increasing the density of the projectile evidently reduces the deceleration of the projectile. The drag coefficient depends, primarily on the size and shape of the projectile, only slightly on its density. Just after water-entry time, the higher the density of the projectile, the faster the expansion of its cavity wall. As time after water entry increases, the expansion velocity of the cavity wall gradually decreases. The simulation results show that the projectile head experiences the greatest pressure, producing a sharp peak, at the moment when it touches the water surface. During the flow stabilization phase, the lower the density of the projectile, the lower the pressure on the head of the projectile. The results of this study will help to guide the selection of material for supercavitating projectiles.

Analysis of Displacement Performance for a Horizontal Flowthrough Sequence Water Sampler

Abstract The research on deep-sea hydrothermal fluids, cold springs, and other bottom water bodies has important implications for ecosystems. But the deep-sea environment is very harsh, and many existing sampling devices cannot meet the requirements in terms of sampling purity and gas preservation capabilities. Many current samplers are basically arranged in a vertical manner, which means that a set of trigger devices need to be installed at the entrance and exit of the sampling channel, which consumes a lot of space. Taking the flowthrough deep-seawater sequence sampling mechanism as the research object, we show a horizontal flowthrough water sampler. Through numerical simulation and experimental research on the displacement mechanism of the target sample and prefilled pure water, the displacement efficiencies under different flow velocities and sampling cavity shapes were obtained. The results confirmed that the positions of the inlet and outlet and the shapes of the sampling cavity have little influence on the displacement efficiencies at high flow rates. However, installing the inlet below the sampling cavity and installing the outlet above the sampling cavity can significantly reduce the blind area of displacement. Setting a small inclination angle to the capsule sampling cavity helps to improve the displacement effect at low flow rates. This design and research results not only simplified the complicated trigger mechanism of the traditional vertical water samplers, but also provided a reference for the operation modes of the samplers under different sample conditions.

7378 Correction of Uterine Anomalies and Its Effect on Infertility and Recurrent Miscarriages in a Study Including 10000 Patients over 6 Years

<h3>Study Objective</h3> use of hysteroscopic metroplasty to enhance and promote the uterine receptivity in infertile women and those who had recurrent miscarriages. <h3>Design</h3> prospective study for 6 years from 2016 including 12000 cases of primary infertility and recurrent miscarriages. <h3>Setting</h3> operative hysteroscopy both 5mm and 9mm, patient on lithotomy position under either general or spinal anaesthesia. <h3>Patients or Participants</h3> cases were selected as primary infertility for more than 2 years, recurrent IVF or ICSI failure, recurrent miscarriages who had 3D transvaginal ultrasound assessment that revealed anomalies including Narrow T shaped, tubular, subseptated and septated cavities. <h3>Interventions</h3> hysteroscopic metroplasty to reach the normal cavity shape and dimensions. If excessive raw area levonorgestril triple dose for 21 days used post operative to enhance healing and putting Foleys catheter size 10 F for 3 days post operative. <h3>Measurements and Main Results</h3> 3D transvaginal ultrasound +or - saline sono hystrography done post hysteroscopic correction by one cycle to compare the shape and dimensions with the preoperative one and to ensure absence of intrauterine adhesions. 88% of cases had successfully got pregnant and continued their pregnancy beyond 36 weeks, 6 % had preterm labour between 30-36 weeks, 2% had preterm labour 28-30 weeks and 4 % still under follow up. <h3>Conclusion</h3> correction of uterine anomalies has a strong significance on success of implantation in cases of infertility, recurrent IVF and ICSI failure and recurrent miscarriages after prober 3D transvaginal ultrasound.

Impact of geometric shape of cavity on heat exchange using Cu-Al2O3-H2O hybrid nanofluid

In the present work, the impact of cavity geometric shape on heat exchange is numerically studied. The Cu-Al2O3 water hybrid nanofluid with a solid volume fraction of 0,03 is considered in this simulation. The bottom wall of the cavity is brought to a constant hot temperature. The two vertical side walls are cooled, and the upper wall of the cavity is adiabatic. In these conditions, four cases are studied. The first one is a rectangular cavity filled with the hybrid nanofluid, while in each case of the other three, the shape of one cavity wall is changed. The numerical results are developed for Rayleigh numbers varying from 103 to 105 and for a laminar and stationary flow regime. The governing equations are solved numerically using the finite volume method (FVM). The results indicate that the cavity shape significantly affects the improvement of heat exchange. We found that the third case gives the best heat exchange compared to the other cases, and the increase in the value of the Rayleigh number contributes to an enhancement in heat exchange, especially in the third case. It also participates in a decrease in the temperature inside the cavity.

Endohedrally Functionalized Heteroleptic Coordination Cages for Phosphate Ester Binding.

Metallosupramolecular hosts of nanoscopic dimensions, which are able to serve as selective receptors and catalysts, are usually composed of only one type of organic ligand, restricting diversity in terms of cavity shape and functional group decoration. We report a series of heteroleptic [Pd2 A2 B2 ] coordination cages that self-assemble from a library of shape complementary bis-monodentate ligands in a non-statistical fashion. Ligands A feature an inward pointing NH function, able to engage in hydrogen bonding and amenable to being functionalized with amide and alkyl substituents. Ligands B comprise tricyclic aromatic backbones of different shape and electronic situation. The obtained heteroleptic coordination cages were investigated for their ability to bind phosphate diesters as guests. All-atom molecular dynamics (MD) simulations in explicit solvent were conducted to understand the mechanistic relationships behind the experimentally determined guest affinities.

Natural convection between hot and cold cylinders in enclosed space filled with copper-water nanofluid

The present contribution is a numerical investigation of the natural convection between two circular objects, where the first one is hot and the second is cold. Both cylinders are placed in an enclosed adiabatic cavity filled with copper-water nanofluid. The cylinders are arranged horizontally in the middle of cavity height. The main target of this paper it to examine the effects of geometrical configurations and the thermo-physical characteristics of nanofluid on the fluid motion and heat transfer rates. The study is conducted for various parameters: Rayleigh number (Ra = 103 to 105), nanoparticle volume fraction (φ = 0 to 10%), the diameter of cylinders (d/H = 0.2 to 0.4), and the gap spacing between cylinder (S/H = 0.25 to 0.7). Also, two cavity shapes are studied (square and circular). The average Nusselt number of the cylinders is computed and plotted as function of the studied parameters. It was concluded that the cavity shape and the particle volume fraction have a negligible effect on the heat transfer rate, whereas the distance between cylinders and the cylinder diameter have a remarkable effect on the flow patterns and convective heat transfer.

Investigation on multiscale features of cavitating flow in convergent-divergent test section using Eulerian–Lagrangian method

Cavitating flows in fluid machineries always present complicated phase morphologies including a wide range of interface length scales. In the present work, an Eulerian–Lagrangian cavitation model is proposed for simulating the unsteady cavitating flow and investigating the multiscale cavitating flow features in a convergent-divergent test section. Most importantly, a two-way transition algorithm is newly developed mainly based on the shape of resolved cavities and the relative size of microscale bubbles compared to the cells, for taking the transition between microscale discrete bubbles and macroscale vapor cavities into consideration. The transient flow field of the two-phase system is described by the filtered Navier–Stokes equation and the sub-grid scale model. The volume of fluid (VOF) method and a discrete bubble model (DBM) are combined for simulating resolvable water-vapor interfaces and unresolvable discrete bubbles, respectively. Applying the proposed multiscale modeling framework, the dissipated bubbles caused by the collapse of shedding cavities that are unable to be represented by the VOF method are well predicted. The results show that the VOF-DBM model is less sensitive to the mesh resolution compared to the VOF method and it is found the dissipated bubbles are transporting around the vortex core region. Detailed bubble dynamics including DBM to VOF and VOF to DBM transitions and the interaction between macroscale cavities and microscale bubbles are well presented, indicating that the proposed VOF-DBM model is a promising approach to reveal the multiscale cavitation characteristics within limited computing resources.

Probing Fast Enantio-Recognition of Drugs with Multiple Chiral Centers by Electrospray-Tandem Mass Spectrometry and Its Mechanism

Chiral drugs are very complex substances since individual enantiomers may differ in pharmacological and toxic effects, making it necessary to analyze enantiomers separately. In this study, we investigated the chiral differentiation of two ezetimibe enantiomers (i.e., SRS-EZM and RSR-EZM) and their mechanisms in complex with β-cyclodextrins (CDs) and metal ions as the auxiliary ligands. For this purpose, two complementary approaches have been employed: electrospray-tandem mass spectrometry (ESI-MS/MS) with collision induced dissociation (CID) and molecular modeling methods, including density functional theory (DFT) calculations and molecular dynamics (MD) simulations. The results showed a good agreement between experimental and theoretical data. It was demonstrated that SRS-EZM can be easily distinguished from RSR-EZM by applying CID in ESI-MS/MS. SRS-EZM is likely to form a more stable complex with β-CD and metal ions, and thus the [SRS-EZM]-Cu-[β-CD] cluster is more energetically difficult to separate from the SRS-EZM molecule compared with RSR-EZM. Such a difference may be attributed to the interactions between the drug molecule and the metal ion, as well as the cavity shape changes of the β-CDs upon complexation with molecular guests. Therefore, enantiomers in chiral drug can be recognized as ternary complexes of metal-analyte-β-CD by ESI-MS/MS with CID.

A high-sensitivity biosensor based on a metal–insulator–metal diamond resonator and application for biochemical and environment detections

In this paper, a novel Refractive Index (RI) sensor on tunable plasmonic nanostructures in the near-infrared (NIR) and mid-infrared (MIR) range has been investigated, using metal-insulator-metal (MIM) and a couple of hexagonal, trapezoid, and diamond cavity (HTD) shapes. The proposed biosensor has a potential biochemical application such as glucose in water and temperature, the numerical results were obtained from the Finite-Difference-Time-Domain (FDTD) method. By optimizing the parameters of the proposed structure, we achieved maximum sensitivity reaching 5155 nm per refractive index unit (RIU), and an extensive range of refractive index from 1 to 1.7 makes the sensor suitable for biochemical as well as medical diagnostic applications, with wavelength resolution reaching as high as 3.5 × 106 RIU−1. Due to its high sensitivity, this structure could pave the way for the development of a feature plasmonic biosensor, sharp spectral response, small size, and wide detection range.

Research on the Relationship Between Meckel's Cavity Shape, Balloon Shape, and Intracapsular Pressure During Percutaneous Balloon Compression

Percutaneous balloon compression is a safe, effective, and minimally invasive therapeutic method for trigeminal neuralgia. Intraoperatively precise compression after the formation of the pear-shaped balloon is the key to the expected effect. In this study, we assessed the relationship between the structure of Meckel's cavity and the shape and intracapsular pressure of the balloon by preoperative magnetic resonance. We respectively analyzed 58 patients with typical trigeminal neuralgia who underwent percutaneous balloon compression surgery in our department. Reconstruction of magnetic resonance imaging 3-dimensional fast imaging employing steady-state acquisition thin-layer scanning sequence was also performed before the operation to analyze the sagittal features of Meckel's cavity. The pressure was recorded continuously when a pear-shaped balloon was forming during the operation. Meanwhile, the balloon height/length (h/l) ratio was measured. The relationship between Meckel's cavity shape, balloon shape, and pressure was analyzed by mentioned parameters. The pain of 57 patients was relieved immediately after the operation, and the effective rate was 98.27% (57 of 58); Recurrence in 2 cases within the median follow-up time (7.5months). Meckel's cavity classification on magnetic resonance showed that the clubbing type, oval type, and flat type accounted for 31.1% (18 of 58), 58.6% (34 of 58), and 10.3% (6 of 58), respectively. The results demonstrated that the intracapsular pressure was low, while the h/l ratio of Meckel's cavity was relatively high. We also found the corresponding pressure results when the ratio was low. However, no significant difference was found between the balloon h/l ratio and Meckel's cavity h/l ratio. Intracapsular pressure of balloon is negatively correlated with the h/l ratio of Meckel's cavity. The individually differentiated formation of the pear-shaped balloon has little correlation with the sagittal shape of Meckel's cavity.

Rf cavity point-charge wakefield computation through a hybrid analytical and numerical approach

We study short-range geometric wakefields of a normal conducting third harmonic cavity, developed by ALBA, which is currently under investigation for the BESSY II main storage ring upgrade. As is commonly done to enhance the shunt impedance, the single cell cavity shape includes smooth nose-cone transitions to the outside beam pipe, which significantly affects the wakefields. Utilizing the general approach developed by the earlier work [B. Podobedov and G. Stupakov, Phys. Rev. ST Accel. Beams 16, 024401 (2013)], a model of point-charge wakefield for cavities of this type is suggested. The wakefield model consists of two parts: the singular part, inherently difficult for numerical codes, is found analytically, and the nonsingular part, which could be retrieved from relatively nondemanding numerical wakefield computations. Based on this hybrid approach, the wakefields due to arbitrary short bunches can be readily obtained both efficiently and accurately. The model was cross-checked against direct numerical simulations and a good agreement was found within the entire range of bunch lengths relevant to potential applications, from sub-millimeter down to $1\text{\ensuremath{-}}\ensuremath{\mu}\mathrm{m}\text{ }\text{ }\mathrm{rms}$. We also observed that the wakefield model of a single cavity applies equally well to a small number of coupled cavities after some straightforward parameter scaling.

Numerical investigation of the purge flow mechanisms and heat-transfer characteristics of turbine rim seals

In gas turbine and aeroengine, the rim seal is set between the turbine stator and rotor to prevent ingestion of the high-temperature mainstream into the rotating cavity. This study examined the sealing efficiency, flow mechanisms, and heat-transfer characteristics of three types of radial rim seal structures, which seriously affect the turbine aerodynamic efficiency and thermal safety. The flows and thermal fields were simulated using steady and unsteady numerical simulations, and dynamic modal decomposition was carried out to extract the unsteady characteristics. The results show that the seal cavity shape affects the seal efficiency. It was found that dolphin-nose with a hook and large cavity results in a higher sealing efficiency. The nose configuration of the cavity upper part also affects the outflow form of the purge flow. The purge flow from a shark-nose seal will inhibit the strength of the mainstream passage vortex, while that from a dolphin-nose seal will result in Kelvin-Helmholtz instability under certain flow rates and induce unsteady vortices. The purge flow will increase the thermal load of the blade and the hub at low flow rates. In particular, the overall thermal load with a dolphin-nose seal is 50% higher than that with a shark-nose structure. It is necessary to balance the sealing efficiency, flow instability characteristics, and heat-transfer characteristics to select an appropriate rim seal configuration.

Visualization analysis of temperature distribution in the cavity of conventional PPS and high-thermal-conductivity PPS during the filling stage of injection molding

Abstract As a highly thermally conductive PPS that is lightweight and has excellent heat dissipation is expected to be applied in various products, its peculiar filling behavior can cause molding defects such as short shots and surface cracks. To address these challenges, it is important to elucidate the filling behavior and clarify the effects of cavity shape and molding conditions. Thus, we intend to visualize the filling behavior of the high-thermal-conductivity PPS. To achieve this goal, we develop an in-process visualization system to reveal both the thermal and kinetic behaviors of the resin while it fills the cavity. In the system, a sapphire prism glass is utilized in the mold for visualization because it exhibits high strength, high heat conduction, and high infrared transmittance. A high-speed visible camera for kinetic behavior and an infrared camera for thermal behavior are utilized. With the developed system, we successfully obtained for the first time the filling behavior of high-thermal-conductivity PPS. Visualization experiments prove that the temperature of the conventional PPS gradually decreases from the tip to the rear of the flow. However, the temperature of the high-thermal-conductivity PPS drops sharply from the tip of the flow to the rear, and breakage at the flow front near the cavity wall is generated. Our interpretation is that the flow front near the cavity wall can be easily broken when it is stretched, because the ductility of the high-thermal-conductivity PPS largely decreases because of the rapid temperature drop. To suppress the formation of this breakage, we modify the cavity shape and molding conditions, and verify its suppression effect.