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Flow and heat transfer in microchannels book cover
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Prediksi dan pengukuran kerugian tekanan, Dinamika teknik journal 2013
Prediksi dan pengukuran kerugian tekanan
Defeloping flow and pressure drop in microchannels
Experiments were conducted to measure the pressure drop and friction factor of water flowing through three copper microchannels of different widths (0.5 mm, 1.0 mm, and 1.71 mm) but the same depth (0.39 mm) and length (62 mm). The experiments covered a Reynolds number range of 234 to 3,430. Pressure drop decreased with increasing inlet temperature, while friction factors showed little difference across test sections. Friction factors agreed reasonably well with conventional developing flow theory. Heat flux had a negligible effect on friction factor.
Cv inggris
This document is a curriculum vitae for Mirmanto that provides biographical and career details. It includes his name, identification numbers, date and place of birth, education history, work experience, research conducted, publications, and community service activities. Mirmanto holds a PhD from Brunel University London and has worked as a lecturer at Mataram University since 1998. His research has focused on topics including flooding in pipes, solar energy applications, and microchannel heat transfer and fluid flow.
Prediction and measurement of pressure drop in microchannels
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise boosts blood flow and levels of neurotransmitters and endorphins which elevate and stabilize mood.
Heat transfer coefficient in microchannels
This article compares two methods for calculating local flow boiling heat transfer coefficients in microchannels: using a linear pressure gradient assumption and direct pressure gradient measurement. An experiment was conducted for boiling water in three single microchannels of varying widths and depths. The local heat transfer coefficients determined by the two methods were found to be significantly different at high heat fluxes. The linear pressure distribution assumption may only be used with caution when the heat flux is below a certain threshold value that depends on the channel size.
Effect of boiling in the upatream loop on instability of flow boiling in a mi...
The document discusses an experiment that measured pressure fluctuations and flow reversals during flow boiling in a single microchannel. Four pressure sensors were inserted into the copper channel to measure pressure fluctuations. Tests were conducted with and without boiling occurring in the upstream loop before the test section. Results showed that pressure fluctuations and flow reversals were caused by bubble activity inside the channel. Boiling in the upstream loop was found to cause unstable flow. Flow reversal could occur when bubbles generated a temporary pressure higher than the inlet pressure. The upstream boiling affected the magnitude and duration of pressure fluctuations and flow reversals.
Developing Flow Pressure Drop and Friction Factor of Water in Copper Microcha...
Experiments were conducted to measure the pressure drop and friction factor of water flowing through three copper microchannels of varying widths (0.5 mm, 1.0 mm, and 1.71 mm) but constant depth (0.39 mm) and length (62 mm). The water temperature was varied from 30-90°C for adiabatic tests and was 30°C with a heat flux of 147 kW/m2 for non-adiabatic tests of the 0.635 mm channel. The friction factors obtained were generally in agreement with conventional developing flow theory and were not significantly affected by temperature. However, pressure drop decreased with increasing inlet temperature.
Recommended
Flow and heat transfer in microchannels book cover
If someone is interested to this paper, please just downloaded it here.
Prediksi dan pengukuran kerugian tekanan, Dinamika teknik journal 2013
Prediksi dan pengukuran kerugian tekanan
Defeloping flow and pressure drop in microchannels
Experiments were conducted to measure the pressure drop and friction factor of water flowing through three copper microchannels of different widths (0.5 mm, 1.0 mm, and 1.71 mm) but the same depth (0.39 mm) and length (62 mm). The experiments covered a Reynolds number range of 234 to 3,430. Pressure drop decreased with increasing inlet temperature, while friction factors showed little difference across test sections. Friction factors agreed reasonably well with conventional developing flow theory. Heat flux had a negligible effect on friction factor.
Cv inggris
This document is a curriculum vitae for Mirmanto that provides biographical and career details. It includes his name, identification numbers, date and place of birth, education history, work experience, research conducted, publications, and community service activities. Mirmanto holds a PhD from Brunel University London and has worked as a lecturer at Mataram University since 1998. His research has focused on topics including flooding in pipes, solar energy applications, and microchannel heat transfer and fluid flow.
Prediction and measurement of pressure drop in microchannels
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise boosts blood flow and levels of neurotransmitters and endorphins which elevate and stabilize mood.
Heat transfer coefficient in microchannels
This article compares two methods for calculating local flow boiling heat transfer coefficients in microchannels: using a linear pressure gradient assumption and direct pressure gradient measurement. An experiment was conducted for boiling water in three single microchannels of varying widths and depths. The local heat transfer coefficients determined by the two methods were found to be significantly different at high heat fluxes. The linear pressure distribution assumption may only be used with caution when the heat flux is below a certain threshold value that depends on the channel size.
Effect of boiling in the upatream loop on instability of flow boiling in a mi...
The document discusses an experiment that measured pressure fluctuations and flow reversals during flow boiling in a single microchannel. Four pressure sensors were inserted into the copper channel to measure pressure fluctuations. Tests were conducted with and without boiling occurring in the upstream loop before the test section. Results showed that pressure fluctuations and flow reversals were caused by bubble activity inside the channel. Boiling in the upstream loop was found to cause unstable flow. Flow reversal could occur when bubbles generated a temporary pressure higher than the inlet pressure. The upstream boiling affected the magnitude and duration of pressure fluctuations and flow reversals.
Developing Flow Pressure Drop and Friction Factor of Water in Copper Microcha...
Experiments were conducted to measure the pressure drop and friction factor of water flowing through three copper microchannels of varying widths (0.5 mm, 1.0 mm, and 1.71 mm) but constant depth (0.39 mm) and length (62 mm). The water temperature was varied from 30-90°C for adiabatic tests and was 30°C with a heat flux of 147 kW/m2 for non-adiabatic tests of the 0.635 mm channel. The friction factors obtained were generally in agreement with conventional developing flow theory and were not significantly affected by temperature. However, pressure drop decreased with increasing inlet temperature.
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Green sand is one of the most important components in the process of metal casting. The sand in Indonesia region is varied level of subtlety, size of sand, and shape of sand. Green sand used in the process of metal casting is possible can affect the quality of casting product. This aims to determine the potential of Tanjung Bintang sand as green sand and the quality of the product in terms of porosity defects. The research was conducted by varying sand river from Tanjung Bintang and sand from Maringgai. Composition made varying is 100%,75%, 50%, and 25% Tanjung Bintang sand compared Maringgai sand with bentonit and water is 10% and 5% constantly .The Examine of the green sand by SNI 15-0312-1989 among other water content, clay content, Grain Finnest Number (GFN), Shape of grain. The result said aluminium casting product with 50% Tanjung Bintang sand has the lowest value of porosity, 5.08% and the higher value with 75% composition of Tanjung Bintang sand, 6.98%.
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2 karakterstik serapan suara komposit polyester
The purpose of this study is to investigate of sound absorption of coconut filter fiber composites. The research material made with coconut filter fiber as reinforcement and matrix resin unsaturated polyester (UPRs) type Yukalac BQTN 157 with 1% hardener types MEKPO (Methyl Ethyl Ketone Peroxide) and fiber treatment by 0,5% KMnO4. Production methods is poltrusion and the variations of fiber volume fraction are 20, 25 and 30% and fiber length are 5, 10 and 15 mm. Testing of sound absorption frequency are 250, 500, 1000, 2000 and 4000 Hz. The results of research show that the highest value of sound absorption coefficient is on the composites with composition of 10 mm fiber length and 30% fiber volume fraction, that is 0.550828. The values are included in the class “Sound Absorption Coefficient Class D (Extremely absorbing)” with the range 0.40 – 0.60 based on ISO standard 11654:1997.
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Due to population growth, industry advance and rapid development, fresh and comfortable air may be difficult to get. Conditioning the air to get comfort environment may be a basic demand for people, but the prices of the device and its operation for this purpose are expensive. This research tries to solve this problem but it is just only to know the capability of the heat exchanger to transfer/ absorb heat and is not to cool the room to be below the ambient temperature. The working fluid used was clean water and the heat exchangers employed were parallel and serpentine which were made of copper pipes with a diameter of 1/4 inch and 1/2 inch (for the header). The volumetric flow rates used were 300 ml/minutes, 400 ml/minutes and 500 ml/minutes. While the heat that should be absorbed by the water from the room is 50 W, 100 W and 150 W. The results show that the effect of volumetric flow rate on heat exchanger performance and room temperature is insignificant. From the pressure drop results, the parallel pipe heat exchanger has lower pressure drops while the serpentine has higher pressure drops.
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With traditional fish drying process, most possible can cause an unhealthy working posture , such as a squatting action. As a consequence , worker will suffer a musculoskeletal disorders because of not ergonomic tools and bad working posture. Without ergonomics working procedures was found that the average of musculoskeletal complaints after working is 52.25 ± 1.03. To solve this ccomplaints, a drying chamber based ergonomics design was built in order to reduce musculoskeletal disorders. Dimensions of the drying chamber were based on anthropometric data of fish craftsmen and the material of drying chamber was by the participatory method. Test was performed on 20 samples and the result showed that the mean rate of musculoskeletal complaints after working is 38.30 ± 1.30. The ergonomic based design for drying camber application can reduce the musculoskeletal complaints up to 26.7%.
Pressure drop and heat transfer characteristics
If someone is interested to this paper, please just downloaded it here.
Ukhtc2013 abstract flow boiling in microchannels
If someone is interested to this paper, please just downloaded it here.
Microfluidics conference abstract flow patterns and heat transfer measurements
If someone is interested to this paper, please just downloaded it here.
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If someone is interested to this paper, please just downloaded it here.
Effect of tube diameter and surface roughness on fluid flow friction factor d...
This article summarizes an experiment that investigated the effect of tube diameter and surface roughness on fluid flow friction factors. Three tubes were tested: a 1.14 mm diameter stainless steel tube, a 17 mm diameter smooth PVC tube, and a 15.5 mm diameter rough PVC tube coated internally with sand. The stainless steel tube results agreed with theoretical predictions. The 17 mm tube results deviated from theory likely due to the lack of a calming section. The rough 15.5 mm tube results showed friction factors were not significantly affected by Reynolds number in turbulent regimes and reasonably agreed with theoretical predictions, indicating diameter decrease has an insignificant effect on friction factor.
SINGLE-PHASE FLOW AND FLOW BOILING OF WATER IN HORIZONTAL RECTANGULAR MICROCH...
This thesis investigates single-phase flow and flow boiling of water in horizontal rectangular microchannels. It presents experimental results on the effects of hydraulic diameter, heat flux, mass flux, and vapor quality on flow patterns, heat transfer coefficients, and pressure drop in three copper microchannel test sections with hydraulic diameters of 0.438 mm, 0.561 mm, and 0.635 mm. The objectives are to modify the existing test rig for microchannel experiments, redesign the test sections, study the effects of parameters on single-phase and two-phase flow, and compare results with existing correlations. Experimental conditions include mass fluxes from 200-1100 kg/m2s, heat fluxes from 0-793 kW/m2,
Pembuatan bio diesel dengan metode kering Jurnal dinamika teknik 2011
1. Dokumen tersebut membahas tentang pembuatan biodiesel dari kelapa dengan metode kering tanpa menggunakan air atau oksigen. Metode ini dianggap lebih sederhana dibandingkan pirolisis.
2. Dijelaskan pula karakteristik yang dinilai dari biodiesel hasil reaksi transesterifikasi seperti berat jenis, viskositas, titik nyala dan nilai kalor.
3. Hasil uji coba menunjukkan bahwa peningkatan konsent
Flow and heat transfer in rectangular microchannels, Scholars Press.com
This document summarizes a book that reports experimental results on flow and heat transfer in horizontal rectangular microchannels. The book focuses on presenting experimental data for single-phase flow and heat transfer characteristics in rectangular microchannels. The single-phase fluid flow results showed no deviation from friction factor theory for three different hydraulic diameters. Additionally, the single-phase heat transfer results demonstrated that smaller test sections yield higher heat transfer coefficients, though hydraulic diameter had insignificant effect on Nusselt number versus Reynolds number trends. The author is a lecturer at Mataram University who received their PhD from Brunel University London in 2013.
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6 optimasi parameter permesinan terhadap waktu proses pada pemrograman cnc mi...
Dokumen ini membahas optimasi parameter permesinan terhadap waktu proses pada pemrograman CNC milling dengan berbasis CAD/CAM. Parameter permesinan yang dioptimalkan meliputi kecepatan potong, kecepatan pemakanan, dan kedalaman pemotongan. Penelitian ini bertujuan untuk mengetahui pengaruh ketiga parameter tersebut terhadap waktu proses pada CNC milling."
5 pengaruh absorsi gas co2 dan h2 s dalam biogas menggunakan pasta batu apung...
Dokumen ini membahas pengaruh pemurnian biogas menggunakan pasta batu apung terhadap peningkatan kinerja mesin bakar. Biogas yang dihasilkan dari fermentasi kotoran kuda mengandung kontaminan seperti CO2 dan H2S yang perlu dihilangkan. Pemurnian dilakukan dengan mengalirkan biogas melalui pasta batu apung dengan variasi laju aliran. Hasil pengujian menunjukkan kinerja terbaik pada putaran 4500 rpm dan laju aliran 2 L
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Pressure drop and heat transfer characteristics
If someone is interested to this paper, please just downloaded it here.
Ukhtc2013 abstract flow boiling in microchannels
If someone is interested to this paper, please just downloaded it here.
Microfluidics conference abstract flow patterns and heat transfer measurements
If someone is interested to this paper, please just downloaded it here.
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If someone is interested to this paper, please just downloaded it here.
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This article summarizes an experiment that investigated the effect of tube diameter and surface roughness on fluid flow friction factors. Three tubes were tested: a 1.14 mm diameter stainless steel tube, a 17 mm diameter smooth PVC tube, and a 15.5 mm diameter rough PVC tube coated internally with sand. The stainless steel tube results agreed with theoretical predictions. The 17 mm tube results deviated from theory likely due to the lack of a calming section. The rough 15.5 mm tube results showed friction factors were not significantly affected by Reynolds number in turbulent regimes and reasonably agreed with theoretical predictions, indicating diameter decrease has an insignificant effect on friction factor.
SINGLE-PHASE FLOW AND FLOW BOILING OF WATER IN HORIZONTAL RECTANGULAR MICROCH...
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1. Dokumen tersebut membahas tentang pembuatan biodiesel dari kelapa dengan metode kering tanpa menggunakan air atau oksigen. Metode ini dianggap lebih sederhana dibandingkan pirolisis.
2. Dijelaskan pula karakteristik yang dinilai dari biodiesel hasil reaksi transesterifikasi seperti berat jenis, viskositas, titik nyala dan nilai kalor.
3. Hasil uji coba menunjukkan bahwa peningkatan konsent
Flow and heat transfer in rectangular microchannels, Scholars Press.com
This document summarizes a book that reports experimental results on flow and heat transfer in horizontal rectangular microchannels. The book focuses on presenting experimental data for single-phase flow and heat transfer characteristics in rectangular microchannels. The single-phase fluid flow results showed no deviation from friction factor theory for three different hydraulic diameters. Additionally, the single-phase heat transfer results demonstrated that smaller test sections yield higher heat transfer coefficients, though hydraulic diameter had insignificant effect on Nusselt number versus Reynolds number trends. The author is a lecturer at Mataram University who received their PhD from Brunel University London in 2013.
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Flow and heat transfer in rectangular microchannels, Scholars Press.com
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