Drying processes in context of the theory of fluid saturated porous materials

Kowalski, S. J.; Musielak, G.; Rybicki, A.

Artykuł - szczegóły

Tytuł artykułu

Drying processes in context of the theory of fluid saturated porous materials

Autorzy

Kowalski S. J. , Musielak G. , Rybicki A.

Treść / Zawartość

Pełne teksty:

httpwww_ptmts_org_pl1998-3-kowalski-in.pdf

Pobierz

Identyfikatory

Warianty tytułu

Procesy suszenia w kontekście teorii zawilżonych materiałów porowatych

Języki publikacji

Abstrakty

The paper presents a thermomechanical model of driving of fluidsaturated capillaric porous materials. The governing equations developed on the basis of balance equations and thermodynamics of irreversible processes are presented. Their solution allows for prediction of the evolution of moisture content distribution of the dried body, and stress induced by drying. The strains and stresses are examined in a prismatic bar dried convectively (2D initial-boundary-value problem). The influence of different drying conditions and various shapes of the bar cross-section on the strains and stresses is discussed using the linear and non-linear models, respectively.

W pracy przedstawiono termomechaniczny model suszenia zawilżonych materiałów kapilarno porowatych. Zaprezwntowano równania podstawowe, wyprowadzone na bazie bilansu i termodynamiki procesów nieodwracalnych. Rozwiązanie tych równań pozwala na analizę ewolucji rozkładu zawartości wilgoci, opis deformacji suszonego materiału i analizę naprężeń suszarniczych. Odkształcenia i naprężenia są analizowane na przykładzie pryzmatycznego pręta suszonego konwekcyjnie (dwuwymiarowy problem początkowo-brzegowy). Dyskutowany jest wpływ różnych warunków suszenia i kształtu przekroju suszonego pręta na odkształcenia i naprężenia przy zastosowaniu liniowego i nieliniowego modelu.

Słowa kluczowe

thermomechanical model of drying deformation of dried body drying-induced stresses

Wydawca

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Czasopismo

Journal of Theoretical and Applied Mechanics

Rocznik

1998

Tom

nr 3

Strony

597--637

Opis fizyczny

Bibliogr. 40 poz., rys.

Twórcy

autor

Kowalski S. J.

kowal@rose.man.poznan.pl

Institute of Technology and Chemical Engineering, Poznan University of Technology

autor

Musielak G.

Institute of Technology and Chemical Engineering, Poznan University of Technology

autor

Rybicki A.

Institute of Technology and Chemical Engineering, Poznan University of Technology

Bibliografia

1. DE BOER R., KOWALSKI S.J., 1995, Thermodynamics of Fluid-Saturated Porous Media with a Phase Change, Acta Mechanica, 109, 167-189.
2. DRUMHELLER D.S., 1978, The Theoretical Treatment of Porous Solid Using Mixture Theory, Int. J. Solids Structures, 14, 441-456.
3. FELCYN T., KOWALSKI S.J., MUSIELAK G., 1996, Problem of Shrinkage of Ceramics, (in Polish) Glass and Ceramics, 2, 11-17.
4. GUMINSKI K., 1974, Thermodynamics, PWN, Warszawa, (in Polish).
5. HUTTER K., 1977, The Foundations of Thermodynamics, Its Basic Postulates and Implications. A Review of Modern Thermodynamics, Acta Mechanica, 27, 1-54.
6. KOWAL M., KOWALSKI S.J., 1995, Experimental Investigation of Water Soaked Wood at Uniaxial and Biaxial States of Stress, Applied Mechanics Review, 48, 10, 684- 689.
7. KOWAL M., RYBARCZYK W., KOWALSKI S.J., 1992, On Mechanical Behaviour of Wet Wood at Various Stress States, Wood Sci. and Technology, 26, 295-306.
8. KOWALSKI S.J., 1987, Thermomechanics of Constant Drying Rate Period, Arch. Appl. Mech., 39, 3, 157-176.
9.KOWALSKI S.J., 1990, Thermomechanics of Dried Materials, Arch. Mech., 42, 2, 123-149.
10. KOWALSKI S.J., 1994, Thermomechanics of Drying Process of Fluid-Saturated Porous Media, Drying Technology, 12, 4, 453-482.
11. KOWALSKI S.J., 1996a, Drying Processes Involving Permanent Deformations of Dried Materials, Int. J. Engng. Sci, 34, 13, 1491-1506.
12. KOWALSKI S.J., 1996b, Mathematical Modelling of Shrinkage by Drying, Drying Technology, 14, 2, 307-331.
13. KOWALSKI S.J., KOWAL M., 1998, Physical Relations for Wood at Variable Humidity, Transport in Porous Media, in print.
14. KOWALSKI S.J., MUSIELAK G., 1988, Mathematical Modelling of the Drying Process of Capillary Porous Media An Example of Convectively Dried Plate, Engng. Trans., 36, 2, 239-252, (in Polish).
15. KOWALSKI S.J., MUSIELAK G., 1989, Problem of Recession of Phase Conversion Zone in Dried Materials, IFTR Reports, 9, (in Polish).
16. KOWALSKI S.J., MUSIELAK G., 1992, A Study of Possibilities of Application of Acoustic Emission to Diagnosis of Fracturing Process during Drying, IFTR Reports, 45, (in Polish).
17. KOWALSKI S.J., MUSIELAK G., 1995, Review of Damage Models with View of their Applications to Dried Materials, IFTR Reports, 11, (in Polish).
18. KOWALSKI S.J., MUSIELAK G., 1996, Modelling of Mechanical Properties of Dried Materials, Proceedings of the 10th International Drying Symposium (IDS'96), Krakow, Poland, A, 267-274.
19. KOWALSKI S.J., MUSIELAK G., 1998, Deformations and Stresses in Dried Wood, Transport in Porous Media, in print.
20. KOWALSKI S.J., MUSIELAK G., RYBICKI A., 1992, Shrinkage Stresses in Dried Materials, Engng. Trans., 40, 1, 115-131.
21. KOWALSKI S.J., MUSIELAK G., RYBICKI A., 1996a, Distribution of Drying Induced Stresses in Samples with Grooves, Studia Geot. et Mech., 18, 1-2, 3-17.
22. KOWALSKI S.J., MUSIELAK G., RYBICKI A., 1996b, Drying Processes - Ther-momechanicał Approach, IFTR-PSP, Poznań-Warszawa, (in Polish).
23. KOWALSKI S.J., MUSIELAK G., RYBICKI A., 1996c, Shrinkage Stresses in Dried Materials with Grooves of Various Shapes, Studia Geot. et Mech., 18, 3-4, 19-26.
24. KOWALSKI S.J., MUSIELAK G., RYBICKI A., 1997, The Response of Dried Materials to Drying Conditions, Int. J. Heat Mass Transfer, 40, 5, 1217-1226.
25. KOWALSKI S.J., RYBICKI A., 1994, Interaction of Thermal and Moisture Stresses in Materials Dried Convectively, Archive of Mechanics, 46, 3, 251-265.
26. KOWALSKI S.J., RYBICKI A., 1995a, Boundary Conditions by Drying of Porous Materials, in: Porous Media in Technology, Medicine and Environmental Science, edit. S.J. Kowalski, J. Mielniczuk, WSP Zielona Góra, 75-101.
27. KOWALSKI S.J., RYBICKI A., 1995b, Drying Induced Stresses as a Function of Drying Parameters, Universität Essen, Mechanik-Forschungsbeńcht, 95/12.
28. KOWALSKI S.J., RYBICKI A., 1996a, Drying Induced Stresses and their Control, Proceedings of the 10th International Drying Symposium (IDS'96), Krakow, Poland, A, 151-158.
29. KOWALSKI S.J., RYBICKI A., 1996b, Drying Stress Formation by Inhomogenous Moisture and Temperature Distribution, Transport in Porous Media, 24, 139-156.
30. KOWALSKI S. J., RYBICKI A., 1998, Computer Simulation of Drying - Optimal Control, Transport in Porous Media, in print.
31. KOWALSKI S.J., STRUMIŁŁO C., 1997, Moisture Transport in Dried Materials. Boundary Conditions, Chem. Engng. Sei, 52, 7, 1141-1150.
32. LEITMAN G., 1966, An Introduction to Optimal Control, McGraw-Hill Inc.
33. LEWIS R.W., STRADA M., COMINI G., 1977, Drying-Induced Stresses in Porous Bodies, Int. J. Num. Meth. Engng., 11, 175-1184.
34. MUSIELAK G., 1991, Numerical Example for Drying Model Including Phase Change, Studia Geot. et Mech., 13, 3-4, 45-59.
35. MUSIELAK G., 1996, Internal Stresses Caused by Outflow of Moisture and Phase Change Inside of Dried Materials, Drying Technology, 14, 2, 289-306.
36. NAPHTALI L.M., 1966, The Second Law. Caratheodory's Principle with Sim-plified Mathematics, A. I. Ch. E. Journal, 12, 1, 195-197.
37. RYBICKI A., 1993, Determination of Drying Induced Stresses in a Prismatic Bar, Engng. Trans., 41, 2, 139-156.
38. RYBICKI A., 1994, Problem of Evolution of Shrinkage Stresses in Dried Materials, PhD Thesis, Technological University, Łódź, (in Polish).
39. STRUMIŁŁO C, 1970, Fundamentals of Drying and its Technology, WNT, Warszawa, (in Polish).
40. WAIT R., MITCHELL A.R., 1986, Finite Element Analysis and Applications, John Wiley & Sons, Chichester.

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BWM1-0002-0037