Home
Giới thiệu
Tài khoản
Đăng nhập
Quên mật khẩu
Đổi mật khẩu
Đăng ký tạo tài khoản
Liệt kê
Công trình khoa học
Bài báo trong nước
Bài báo quốc tế
Sách và giáo trình
Thống kê
Công trình khoa học
Bài báo khoa học
Sách và giáo trình
Giáo sư
Phó giáo sư
Tiến sĩ
Thạc sĩ
Lĩnh vực nghiên cứu
Tìm kiếm
Cá nhân
Nội dung
Góp ý
Hiệu chỉnh lý lịch
Thông tin chung
English
Đề tài NC khoa học
Bài báo, báo cáo khoa học
Hướng dẫn Sau đại học
Sách và giáo trình
Các học phần và môn giảng dạy
Giải thưởng khoa học, Phát minh, sáng chế
Khen thưởng
Thông tin khác
Tài liệu tham khảo
Hiệu chỉnh
Số người truy cập: 107,088,539
Solid foams as packed pentagonal dodecahedrons
abortion stories gone wrong
read
teenage abortion facts
Tác giả hoặc Nhóm tác giả:
Tri Truong Huu, Cuong Pham Huu, David Edouard
marriage affairs
open
i want an affair
Nơi đăng:
'Metfoam2009', September 2003, Bratislava - Czech Republic (Poster);
S
ố:
xxx;
Từ->đến trang
: xxx;
Năm:
2009
Lĩnh vực:
Khoa học công nghệ;
Loại:
Báo cáo;
Thể loại:
Quốc tế
TÓM TẮT
The modeling of the three-dimensional structure of solid foams and their geometrical dimensions is part of fundamental necessity for investigation in many processes. The research reported in this paper was under-taken to fulfill this need. In literature, the foam cell geometric idealization has been employed for analytical and computational studies which are used for heat and mass transfer modeling. The main theoretical geometrical (RUC, cubic and the tetrakaidecahedron) models were synthesized by Edouard et al. The next step in the direct cell modeling is obtaining the most representative cell structure of a solid foam valid on a large range of porosities (i.e. 0.7 <
e
< 0.95). In this context, the perfect regular pentagonal dodecahedron geometry with triangular or cylindrical struts is developed in order to estimate the main characteristic lengths of the cellular material. Commercially available solid foams form a complex array of interconnected struts with an irregular lump of solid at the intersection of two struts. This matter deposit can be taken into account in the pentagonal dodecahedron geometry with smooth volume. Finally, the theoretical values (strut and pore diameters, specific surface) obtained with this new pentagonal dodecahedron model are compared with the main models and experimental values of the open literature
ABSTRACT
The modeling of the three-dimensional structure of solid foams and their geometrical dimensions is part of fundamental necessity for investigation in many processes. The research reported in this paper was under-taken to fulfill this need. In literature, the foam cell geometric idealization has been employed for analytical and computational studies which are used for heat and mass transfer modeling. The main theoretical geometrical (RUC, cubic and the tetrakaidecahedron) models were synthesized by Edouard et al. The next step in the direct cell modeling is obtaining the most representative cell structure of a solid foam valid on a large range of porosities (i.e. 0.7 <
e
< 0.95). In this context, the perfect regular pentagonal dodecahedron geometry with triangular or cylindrical struts is developed in order to estimate the main characteristic lengths of the cellular material. Commercially available solid foams form a complex array of interconnected struts with an irregular lump of solid at the intersection of two struts. This matter deposit can be taken into account in the pentagonal dodecahedron geometry with smooth volume. Finally, the theoretical values (strut and pore diameters, specific surface) obtained with this new pentagonal dodecahedron model are compared with the main models and experimental values of the open literature
© Đại học Đà Nẵng
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: dhdn@ac.udn.vn