STUDIES OF SIMULATIONS OF TWO-PHASE WATER-AIR FLOWS USING ANSYS CFX.

Normally in all simulations of flows in computational fluid dynamics, CFD, it is common to use characteristic planes to visualize the profiles of the parameters of interest, mainly in 3D simulations. The present work proposes a standard form of visualization that shows, mainly in two-phase flows, in a more realistic way, the dynamics of the development of the phase flow. This visualization is present within the CFX program in the post-processing module, in the option of representing volumes using sub option, isovolumes. Through this representation, the program highlights the volumes of the finite element mesh corresponding to the selected values of the parameter to be analyzed such as pressure, velocity, volumetric fraction, etc. By means of the volume-isovolume representation, a well representative effect of the current flow pattern is obtained, especially when the volumetric fraction of the air or the gas phase of the flow is emphasized. This form of visualization is being applied to the study of inclined two-phase flows, which will be tested in a new experiment currently under construction at the Laboratory of Experimental Thermal-Hydraulics – LTE of the Institute of Nuclear Engineering - IEN in Rio de Janeiro

Indicadores de digestibilidade de dietas para ovinos contendo feno de ponta de cana-de-açúcar hidrolisado.

Made available in DSpace on 2017-12-18T23:24:49Z (GMT). No. of bitstreams: 1 RBSPA2017V18N1FENODEPONTADECANA.pdf: 190963 bytes, checksum: 9b647ac7ed3ea86ec0ade23af14eb5e5 (MD5) Previous issue date: 2017-12-18bitstream/item/169216/1/RBSPA-2017-V18-N1-FENO-DE-PONTA-DE-CANA.pd

Reproductive biology of Pseudotocinclus tietensis (Siluriformes: Loricariidae: Hypoptopomatinae), a threatened fish species

Pseudotocinclus tietensis is endemic to the Upper Tietê River basin and classified as vulnerable. The reproductive biology of this species is still unknown, therefore, we investigated its reproductive strategy and gonad development during its annual reproductive cycle. The fish were collected throughout one year, and histology of the gonads, fecundity and oocyte diameter was conducted. Three phases of gonad maturation were found in males and females (immature, developing, and spawning capable), and the development stages of the gametes were identified within each stage. In the testes, four stages of gamete development were distinguished: spermatogonia, spermatocytes, spermatids and spermatozoa. During spermiation, the spermatozoa were released into the tubular lumen and then continued through the efferent ducts. In the ovaries, five stages of gamete development were identified: chromatin nuclear, perinucleolar, yolk vesicle formation, vitellogenic and ripe. The minimum diameter of ovulating oocytes was 297 µm, and the absolute fecundity was 64 to 306 oocytes. Males with spermatozoa in the lobular lumen and females with vitellogenic and ripe oocytes were found throughout the year. Pseudotocinclus tietensis has asynchronous ovarian development and gametes with fertilization capacity can be eliminated throughout the annual cycle

Nutritive value of diets containing pods of faveira (Parkia platycephala Benth.) for confined finishing sheep.

Performance and apparent digestibility were evaluated in sheep fed diets containing different amounts f faveira (Parkia platycephala) pods in replace to corn. Twenty crossbred Santa Inês lambs of approximately four months of age and average 21 kg were kept in individual stalls in randomized blocks and distributed according to weight. he following characteristics were evaluated: average daily gain, feed conversion and voluntary intake of dry matter DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), total arbohydrates (TCH), non-fibrous carbohydrates (NFC); and apparent digestibility of DM, OM, CP, NDF, ADF, TCH, NFC and total digestible nutrients (TDN). P. platycephala pods inclusion in the diets promoted no significant difference n the intakes of dry matter, organic matter, total carbohydrate and total digestible nutrients and also sheep performance. here was no treatment effect in the digestibility of organic matter, crude protein, fatty acids, neutral detergent fiber r total digestible nutrients. There was no effect of treatment for organic matter digestibility, crude protein, fatty acids, eutral detergent fiber or total digestible nutrients. The inclusion of up to 75% of faveira pods in substitution to corn rains in diets for finishing animals does not influence weight gain or feed conversion, although the replacement of more han 50% compromises the digestibility of dry matter

Rainfall Erosivity: Gap-Filling Method Differences in the Brazilian Pantanal and Cerrado Biomes

To improve the use of soil and its conservation, precipitation data are necessary. With the Universal Soil Loss Equation (USLE), the study of historical precipitation series is a main factor, but in these series, there are gaps that need to be filled. This study had, as a basis, the methods of weighted likelihood, multiple regression, and weighted likelihood based on multiple regression to fill the gaps of the rainfall data for the rainfall gauges in the Brazilian biomes (Cerrado and Pantanal, municipalities of Campo Grande, Bandeirantes, Sidrolândia, Miranda, Fazenda Ponte, and Ribas do Rio Pardo). With this, it became possible to calculate the rainfall erosivity (R factor in the USLE). Therefore, the consistency of the filled rainfall data was analyzed by the double mass method. The value of the rainfall erosivity calculated varies from 2304.80 to 13562.10 MJ mm ha−1 h−1 year. With this data, it was possible to identify particular results that differed from the rainfall erosivity. Comparing all the gap-filling methods, numbers varying from 0–12% at the same rainfall gauge were obtained

Hydrolyzed sugarcane tip hay constitutes alternative forage in diets for finishing sheep.

The balance of nitrogen compounds was evaluated in finishing sheep fed diets containing hydrolyzed sugarcane tip hay. The experiment was carried out at the DZO/CCA/UFPI, in Teresina, PI, Brazil

Specific heat and magnetic measurements in Nd0.5Sr0.5MnO3, Nd0.5Ca0.5MnO3 and Ho0.5Ca0.5MnO3 samples

We studied the magnetization as a function of temperature and magnetic field in the compounds Nd0.5Sr0.5MnO3, Nd0.5Ca0.5MnO3 and Ho0.5Ca0.5MnO3. It allowed us to identify the ferromagnetic, antiferromagnetic and charge ordering phases in each case. The intrinsic magnetic moments of Nd3+ and Ho3+ ions experienced a short range order at low temperatures. We also did specific heat measurements with applied magnetic fields between 0 and 9 T and temperatures between 2 and 300 K in all three samples. Close to the charge ordering and ferromagnetic transition temperatures the specific heat curves showed peaks superposed to the characteristic response of the lattice oscillations. Below 10 K the specific heat measurements evidenced a Schottky-like anomaly for all samples. However, we could not successfully fit the curves to either a two level nor a distribution of two-level Schottky anomaly. Our results indicated that the peak temperature of the Schottky anomaly was higher in the compounds with narrower conduction band.Comment: submitted to PR

Middle Childhood Adverse Psychomotor Outcomes from Malaria in Pregnancy: A Study using the Denver Developmental Screening Test-II

Objective: to evaluate changes in the development of premature children aged 5 to 6 years, born to mothers with malaria during pregnancy and to compare them to a control group of premature children born to mothers who did not have malaria during pregnancy. Methods: cross-sectional and analytical study. The Denver test-II was applied to 20 children in the study group and 20 children in the control group. Results: in the group of premature children of mothers with malaria during pregnancy, the vast majority showed abnormal performance with more significant changes in the activities of the language sector "define seven words", "say two compound words", "understand four prepositions" and "account five blocks”, “knows three adjectives”. In the fine-adaptive motor sector, the activities "draw people with six parts", "copy disassembled square", "copy +" and in the gross motor sector "swing your foot for six seconds", "swing your foot for five seconds", "swing the foot for four seconds", "rocks the foot for three seconds", were the most important developmental changes. In the control group, the performance of suspected delay or possible abnormality was more concentrated in the gross motor sector. Conclusions: children from 5 to 6 years of age, born prematurely to mothers with malaria during pregnancy, 80% had suspected abnormal performance, a result much higher than the group of children born prematurely to mothers without malaria. These results strongly suggest that malaria disease during pregnancy alters fetal development, producing developmental sequelae that can be detected even at 5 to 6 years of age. In addition, the results support the use of the Denver test-II as a simple screening method for the assessment of delays in child development, covering broad motor coordination (coarse), fine motor coordination (adaptive), language and personal-social adaptation. This test has been used to identify children who are at risk of developing problems and to monitor the child longitudinally