• Title/Summary/Keyword: CUPID

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NUMERICAL METHOD FOR TWO-PHASE FLOW ANALYSIS USING SIMPLE-ALGORITHM ON AN UNSTRUCTURED MESH (비정렬격자 SIMPLE 알고리즘기반 이상유동 수치해석 기법)

  • Kim, Jong-Tae;Park, Ik-Kyu;Cho, Hyung-Kyu;Kim, Kyung Doo;Jeong, Jae-Jun
    • Journal of computational fluids engineering
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    • v.13 no.4
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    • pp.86-95
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    • 2008
  • For analyses of multi-phase flows in a water-cooled nuclear power plant, a three-dimensional SIMPLE-algorithm based hydrodynamic solver CUPID-S has been developed. As governing equations, it adopts a two-fluid three-field model for the two-phase flows. The three fields represent a continuous liquid, a dispersed droplets, and a vapour field. The governing equations are discretized by a finite volume method on an unstructured grid to handle the geometrical complexity of the nuclear reactors. The phasic momentum equations are coupled and solved with a sparse block Gauss-Seidel matrix solver to increase a numerical stability. The pressure correction equation derived by summing the phasic volume fraction equations is applied on the unstructured mesh in the context of a cell-centered co-located scheme. This paper presents the numerical method and the preliminary results of the calculations.

Repair of Complete Cleft Lip Using Extended Mohler Repair (완전 구순열에서 확장 Mohler법의 적용)

  • Park, Young-Wook
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.34 no.3
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    • pp.200-204
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    • 2012
  • In the repair of unilateral complete cleft lip, the most popular method is the rotation-advancement by Millard. Despite advantages of Millard repair, a few pitfalls exist. Above all, some of the scars, at the height of the cleft side philtral ridge, cross the Langer's line. Further, in the repair of complete cleft lip, small triangular lateral lip flap is often added in the base of an advancement flap to level the Cupid's bow. Moreover, preservation of the advancement flap has some negative effects on a primary nasal repair. As a result, the shape of philtrum is somewhat unnatural. Therefore, I applied the extended Mohler repair in the six cases of complete wide cleft lip to get a more esthetic scar. As a result, more natural, straight philtral ridge was obtained, without adding small triangular flap in the base of the advancement flap.

Primary Correction of Unilateral Cleft Lip by the Tennison-Randall Method: Cases Report and Literatures Review (Tennison-Randall법을 이용한 편측성 구순열의 일차적 교정: 증례보고 및 문헌고찰)

  • Park, Yong-Tae;Kim, Seong-Gon;Park, Young-Wook;Kwon, Kwang-Jun;Park, Ki-Yu
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.33 no.2
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    • pp.154-157
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    • 2011
  • The primary purpose of cleft lip surgery should be the aesthetic and functional recovery of the facial components. Triangular flap repair is one of the most common techniques used in cleft lip surgery. In this case report, thirty patients with unilateral cleft lip had been treated using the Tennison-Randall method. The results were favorable and there have been no permanent complications.

Design for ILS in Ammunition Development applying QFD Method (QFD를 활용한 탄약 ILS 효율화 방안 연구)

  • Lee, Seung-Mok;Park, Young-Won
    • Journal of the Korean Society of Systems Engineering
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    • v.5 no.2
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    • pp.1-9
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    • 2009
  • This paper proposes an effective method on the DFILS(Design for Integrated Logistics Support) in ammunition development applying QFD(Quality Function Deployment) method. The goal of this research is to define the Design for ILS approach at the start of the ammunition development and to yield a set of reusable requirements. Based on 000mm High-Explosive(Warship ammunition) development work, a QFD software tool, CUPID, was used to analyze and define the field force's requirements. Additionally, a set of reusable requirements are identified and defined for use during the Design for ILS development phase in the next-generation ammunition development process. These set of requirements that consider both the priority and importance of the VOC(Voice of Customer) will contribute to the early phase of the ammunition development to implement the Design for ILS specialty engineering effort.

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NUMERICAL METHOD FOR TWO-PHASE FLOW ANALYSIS USING SIMPLE-ALGORITHM ON AN UNSTRUCTURED MESH (비정렬격자 SIMPLE 알고리즘기반 이상유동 수치해석 기법)

  • Kim, Jong-tae;Park, Ik-Kyu;Cho, Hyung-Kyu;Kim, Kyung-Doo;Jeong, Jae-Jun
    • 한국전산유체공학회:학술대회논문집
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    • 2008.03a
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    • pp.71-78
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    • 2008
  • For analyses of multi-phase flows in a water-cooled nuclear power plant, a three-dimensional SIMPLE-algorithm based hydrodynamic solver CUPID-S has been developed. As governing equations, it adopts a two-fluid three-field model for the two-phase flows. The three fields represent a continuous liquid, a dispersed droplets, and a vapour field. The governing equations are discretized by a finite volume method on an unstructured grid to handle the geometrical complexity of the nuclear reactors. The phasic momentum equations are coupled and solved with a sparse block Gauss-Seidel matrix solver to increase a numerical stability. The pressure correction equation derived by summing the phasic volume fraction equations is applied on the unstructured mesh in the context of a cell-centered co-located scheme. This paper presents the numerical method and the preliminary results of the calculations.

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NUMERICAL METHOD FOR TWO-PHASE FLOW ANALYSIS USING SIMPLE-ALGORITHM ON AN UNSTRUCTURED MESH (비정렬격자 SIMPLE 알고리즘기반 이상유동 수치해석 기법)

  • Kim, Jong-Tae;Park, Ik-Kyu;Cho, Hyung-Kyu;Kim, Kyung-Doo;Jeong, Jae-Jun
    • 한국전산유체공학회:학술대회논문집
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    • 2008.10a
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    • pp.71-78
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    • 2008
  • For analyses of multi-phase flows in a water-cooled nuclear power plant, a three-dimensional SIMPLE-algorithm based hydrodynamic solver CUPID-S has been developed. As governing equations, it adopts a two-fluid three-field model for the two-phase flows. The three fields represent a continuous liquid, a dispersed droplets, and a vapour field. The governing equations are discretized by a finite volume method on an unstructured grid to handle the geometrical complexity of the nuclear reactors. The phasic momentum equations are coupled and solved with a sparse block Gauss-Seidel matrix solver to increase a numerical stability. The pressure correction equation derived by summing the phasic volume fraction equations is applied on the unstructured mesh in the context of a cell-centered co-located scheme. This paper presents the numerical method and the preliminary results of the calculations.

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VERIFICATION OF TURBULENCE AND NON-DRAG INTERFACIAL FORCE MODELS OF A COMPUTATIONAL MULTI-FLUID DYNAMICS CODE (CMFD 코드의 난류 모델 및 비견인력 모델의 검증 계산)

  • Park, Ik Kyu;Chun, Kun Ho
    • Journal of computational fluids engineering
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    • v.18 no.2
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    • pp.99-108
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    • 2013
  • The standard drag force and virtual mass force, which exert to the primary flow direction, are generally considered in two-phase analysis computational codes. In this paper, the lift force, wall lubrication force, and turbulent dispersion force including turbulence models, which are essential for a computational multi-fluid dynamics model and play an important role in motion perpendicular to the primary flow direction, were introduced and verified with conceptual problems.

The Straight Line Repair for Unilateral Incomplete Cleft Lip - Cases report and journal review (편측성 불완전 구순열의 직선 봉합법에 의한 수복 - 증례 보고 및 문헌고찰)

  • Kim, Hak-Kyun;Kim, Jae-Jin;Kim, Eun-Suk
    • Korean Journal of Cleft Lip And Palate
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    • v.11 no.2
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    • pp.77-82
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    • 2008
  • The harmonious lip length, residual scar and Cupid's bow width and peak with a normal side are the aims of a unilateral cleft lip repair. Also, long term amelioration without necessary of revisional surgeries may be the ideal conditions. No one method can satisfy the wide varieties of cleft lip deformities. Recently with rearrangement of paraoral muscle and some modifications, a straight line repair technique has been concerned again. Straight scar line, simplicity, and short learning curve are the advantages of the straight line technique. Here two cases of the simple straight line technique were presented and discussed for its usefulness and reliability with short reviews of previous reports.

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AN EXPERIENCE OF UNILATERAL INCOMPLETE CLEFT LIP REPAIR BY USING BARDACH'S TRIANGULAR FLAP (Bardach 삼각피판법을 이용한 편측성 불완전 구순열의 수복 경험)

  • Ryu, Sun-Youl;Han, Chang-Hun
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.28 no.4
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    • pp.348-355
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    • 2006
  • Tennison was the first to recognize and to preserve the Cupid's bow by lowering the peak in the margin of the cleft. Randall had modified the Tennison's repair based on accurate measurements. Bardach's technique evolved from the basic concept of triangular flap cleft lip repair described by Tennison-Randall method. Precise measurements are used to define the dimensions of the equilateral triangular flap, which is created on the cleft side and is inserted into an equilateral triangular defect on the noncleft side. Two symmetrical vertical distances on either side of the cleft are thus formed. It is essential that the incisions in the skin correspond precisely with those on the muscles and mucosa, and that all layers are sutured with the use of the triangular flap, thus preventing vertical scar contracture. This procedure produces a symmetric, balance lip with a well-defined Cupid's bow, a symmetric vermilion, and a properly aligned orbicularis oris muscle. We had treated three patients with unilateral incomplete cleft lip by using Bardach's triangular flap method. The operation scars could be reduced comparing to Millard method because Bardach's method did not use the columella base and the alar base incision. And the flap design was more simple and accurate comparing to Tennison-Randall method. On the other hand, the postoperative scars on the philtrum pointed as a disadvantage of triangular flap method were cosmetically acceptable because the three patients had incomplete cleft lip. We have experienced that Bardach's triangular flap is a recommendable technique for the repair of unilateral incomplete cleft lip.

Photogrammetric Study of Lip in Young Population in Korean (한국 청년층 구순의 사진 계측학적 연구)

  • Kim, Woo Seob;Hong, Jung Soo;Kim, Han Koo;Kim, Seung Hong
    • Archives of Plastic Surgery
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    • v.32 no.2
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    • pp.155-160
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    • 2005
  • The aim of this study is to establish anatomical dimension of the lip in young population in Korean, using specially designed soft ware with photographic image. We measure 13 anatomical dimensions of lips in 2,229 young people. (917 male, 1312 female, Aged from 18-33 years. Average age 19.7). Statistical analysis of these measurements of large population could offer useful information in facial plastic surgery. The mean measurements are as follows 1. Lengths (male/female) Widths of philtrum: $1.11{\pm}0.19cm/1.02{\pm}0.21cm$ Heights of philtrum: $1.6{\pm}0.24cm/1.47{\pm}0.21cm$ Heights of cupid bow: $0.88{\pm}0.16cm/0.83{\pm}0.16cm$ Height of upper vermilion: $0.74{\pm}0.16cm/0.70{\pm}0.15cm$ Height of lower vermilion: $1.08{\pm}0.17cm/1.02{\pm}0.15cm$ Height of upper lip(Rt.): $1.24{\pm}0.2cm/1.23{\pm}0.2cm$ Height of upper lip(Lt.): $1.24{\pm}0.2cm/1.17{\pm}0.19cm$ Half horizontal length of lip: $2.2{\pm}0.26cm/2.11{\pm}0.2cm$ Horizontal length of lip: $4.41{\pm}0.4cm/4.25{\pm}0.36cm$ Height of lower face: $7.1{\pm}0.58cm/6.52{\pm}0.6cm$ 2. Angles Nasolabial angle: $97.77{\pm}11.97^{\circ}/95.5{\pm}11.34^{\circ}$ Mentolabial angle: $133.88{\pm}14.65^{\circ}/129.27{\pm}13.67^{\circ}$ Angle of Cupid's bow: $111.65{\pm}13.99^{\circ}/116.75{\pm}16.2^{\circ}$ Previous reported photogrammetric measurements was difficult to implement to surgical practice. Because these were printed photographies of the same size. Therefore, in this study, we can measure a lot of objects and items more conveniently and correctly by using proportional program on computer after taking a digital photograph. Consequently, proportional measurements with photogrammetry of lip could be useful and corrective substitute for anthropometrical measuring. These data could be useful reference for preoperative consultation, surgical planning and learning anatomical measurement of lips and adjacent structures.