Autor: Żołądek, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Transient Thermal Phenomena during Spontaneous Water Migration in Zeolite Beds
Autorzy:: Żołądek-Nowak, J.
Milczarek, J.
Fijał-Kirejczyk, I.
Żołądek, J.
Jurkowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1419615.pdf
Data publikacji:: 2012-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 82.75.Jn
61.05.Tv
47.56.+r
81.05.Rm
Opis:: The changes in local temperature occurring during spontaneous imbibition of columnar samples of dry natural zeolite with water were studied. The temperature pulses of 20-250 s duration and 3-40°C amplitude were registered and correlated with the wetting front motion observed with neutron radiography. The amplitude of the pulses was shown to increase with increasing ambient temperature. The broadening of the temperature pulse with increasing distance from the water supplied end of the samples was observed. The amplitude and the pulse width were found to depend substantially on the drying temperature of the material. The observed effect was attributed to the heat of immersion released in the sample at the moving wetting front.
Źródło:: Acta Physica Polonica A; 2012, 122, 2; 415-418
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Neutron Radiography Studies of Water Self-Diffusion in Porous Medium
Autorzy:: Milczarek, J.
Fijał-Kirejczyk, I.
Chojnowski, M.
Żołądek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1813181.pdf
Data publikacji:: 2008-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 66.10.cg
66.30.jj
47.56.+r
81.70.-q
Opis:: The results of neutron radiography studies on macroscopic self-diffusion of water confined within rigid porous material reveal the substantial reduction in diffusion constant in comparison to the diffusion in large volume. The studies performed in the 30-50°C temperature range on fired clay brick of 30% porosity show decrease in diffusion constant to approximately 17% of its value for free space and the Archie exponent is 1.4. The Arrhenius law was confirmed and the activation energy was found of the same value as in the water bulk.
Źródło:: Acta Physica Polonica A; 2008, 113, 4; 1237-1244
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Effect of Gravitation on Water Migration in Granular Media
Autorzy:: Milczarek, J.
Fijał-Kirejczyk, I.
Żołądek, J.
Chojnowski, M.
Kowalczyk, G.
Powiązania:: https://bibliotekanauki.pl/articles/1813182.pdf
Data publikacji:: 2008-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 47.56.+r
68.08.De
81.70.-q
Opis:: The results of the experiments on water migration in unsaturated granular media performed with dynamic neutron radiography technique are presented. It was found that the porosity of the medium did not determine the kinetics of the process in a marked way. The influence of gravity was found to be considerable for media like coarse sand and gravel, consisting of large grains. No effect of gravitation on the water migration in clay beds was observed. The results are discussed in terms of the classical Washburn-Bosanquet theory of adhesion driven motion of the liquid in a straight circular capillary under gravity. It was found that this theory provides only qualitative description of the water migration within granular media, and the viscous dissipation effects are greatly underestimated.
Źródło:: Acta Physica Polonica A; 2008, 113, 4; 1245-1254
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Application of Statistical Image Analysis in Quantification of Neutron Radiography Images of Drying
Autorzy:: Fijał-Kirejczyk, I.
Milczarek, J.
Żołądek-Nowak, J.
de Beer, F.
Radebe, M.
Nothnagel, G.
Powiązania:: https://bibliotekanauki.pl/articles/1419614.pdf
Data publikacji:: 2012-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.59.bf
07.05.Pj
61.05.Tv
81.05.Rm
47.56.+r
47.55.nb
Opis:: The statistical approach to the thermal neutron radiography picture analysis is applied to evaluation of the experimental results obtained for drying of rectangular and cylindrical samples of granulated and rigid porous materials. We have shown that the time dependence of the standard deviation of image brightness reflects the appearance and motion of the drying front observed during second period of the drying process. The results are discussed within a simple two-region model of the drying sample image.
Źródło:: Acta Physica Polonica A; 2012, 122, 2; 410-414
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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