Volumetric Reconstruction of Taylor Slug Gas Flow Using IR Transceiver in Minichannels N. Mithran, M. Venkatesan IEEE Transactions on Instrumentation and Measurement, 2020 Taylor slug flow commonly occurs in crude oil pipelines, mini-/microreactors, space propulsion thrusters, heat exchangers, and nuclear reactors. The flow is an intermittent gas regime which occurs in flowing liquid inside pipelines and capillary tubes. Measurement of liquid-film thickness and cross-sectional and volumetric void fraction is necessary for an effective operation and safety of many industrial processes involving heat and mass transfer operations. In industrial applications such as miniheat exchangers, lab-on-chip devices, and pulsating heat pipes, gas–liquid Taylor flow enhances heat and mass transfer. The dominance of surface tension force is responsible for the occurrence of Taylor flow. Online measurement of void fraction is essential to determine heat and mass transfer characteristics of systems involving the two-phase flow. This article focuses on developing an instrumentation technique for the measurement of volumetric voids in minichannels. The effect of thickness of liquid films and nose/tail shape on infrared (IR) transceiver irradiation is studied. The experiments are done in two borosilicate glass tubes (3.40 and 1.50 mm inner diameter and 0.6 and 2.5 mm thickness, respectively) to measure liquid-film thickness and volumetric void fraction using a pair of IR transceiver. A numerical model is developed using COMSOL Multiphysics for the same experimental conditions. The effect of nose/tail curvature shape and liquid-film thickness on volumetric void fraction is predicted using a novel simple algorithm. A 3-D reconstruction technique is developed by measuring the undulations at the sides and top/bottom of the Taylor slug using a pair of IR transceiver output current (mA).
Signal characteristics of IR transceiver pair during two phase flow of varying liquid film thickness in a mini-channel Nagarajan Mithran, Muniyandi Venkatesan Chemical Engineering Communications, 2020 Taylor bubble/slug flow is a type of multiphase flow that is predominant in many natural and industrial applications. A thorough understanding of two phase flows and void fraction measurement is essential to understand thermal hydraulic behavior during accident conditions in nuclear reactors. The performance of mini-reactors/microreactors and microthrusters requires a complete knowledge on shape and size of the void fraction distribution, which governs the flow characteristics in mini-channels/microchannels. The present study focuses on analyzing the signal characteristics of two IR transceivers simultaneously during two-phase bubble/slug regime having varying liquid film thickness. The transceivers are positioned at 90° and 0° to the axis of a tube of 1.5 mm diameter and 2.5 mm thickness. The experimental signal output is compared with the results obtained from a numerical model developed using COMSOL Multiphysics package. The present study exposes the critical parameters that need to be considered while developing a 3D reconstruction methodology based on IR transceivers for volumetric void fraction measurement.
IR Transceiver Irradiation Characteristics on Bubble/Slug Flow Regimes in Conventional and Minichannels N. Mithran, Venkatesan Muniyandi IEEE Transactions on Instrumentation and Measurement, 2019 Multiphase fluid flows commonly occur in petrochemical, biotech, food, and process industries. Extraction and flow of crude oil is an example of multiphase solid, liquid, and gas flows. In this paper, the output signal characteristics of an infrared (IR) transceiver sensing system during the two-phase flows of air–water mixture inside a 2.64 mm diameter and 0.30-mm-thick glass tube is presented. An optimized distance between IR LED (transmitter) and center of the test section is predicted using COMSOL Multiphysics so that the receiver senses maximum number of photons. The experiments are done for the optimized distance to analyze bubble/slug of varying length and shapes. High-speed imaging is used for image registration of the flow regimes. A numerical model is developed with COMSOL package to understand the signal characteristics for multiple bubble/slug of varying sizes and is validated with the experimental results. Also with the developed model, a method is proposed to predict the liquid film thickness in mini/microtubes of diameters 3.42, 1.51, and 0.62 mm inner diameter and 0.60-, 1.50-, and 2.57-mm thickness, respectively. The results can be used to design IR transceiver array to measure the liquid film thickness in two-phase flow online.
Integration of Hall Sensor in a 3D Printer as a Limit Switch T Subhasankari, A Sharvin Infant, A Viswasundar, M. Venkatesan, N. Mithran 2017 IEEE International Conference on Computational Intelligence and Computing Research Iccic 2017, 2018 The 3D printer is a three-dimensional prototyping machine which fabricates desired shape by layer over layer material deposition. The printer's extruder should be at its homing position before any deposition process begins. Also keeping the deposition process within the specified limits of movement is very vital. The precise positioning of the extruder can be done using limit switches. This paper focuses on using a hall sensor as a limit switches and comparing its advantages over conventionally used intrusive sensors (mechanical switches). If the movement of the extruder is not within the given workspace, undesirable dimensional changes may happen in the end product. Conventionally the positioning is done by using mechanical switches which may undergo wear and need a regular replacement. The limit switch is an electromagnetic device which restricts the movement of the extruder outside the permissible limit. The limit switch detects the motion of the machine parts and sends feedback to the controller which in turn control the machine. When compared to a opto switch, the device is relatively cheap with all the desired characteristics including no wear
Concentration Variation Detection of Hydrogen Peroxide Using an IR Sensor P. Mohith, S. Vijaya Raghavan, P. M. Siva, N. Mithran, M. Venkatesan 2017 IEEE International Conference on Computational Intelligence and Computing Research Iccic 2017, 2018 Hydrogen peroxide is a monopropellant which is called as a green fuel. It is used in micro propulsion devices for controlling and maneuvering of nano satellites. The concentration of hydrogen peroxide decides the thrust produced in such mini/micro thrusters where the thrust is of the order of few newtons. This paper focuses on the detection of concentration of hydrogen peroxide based on the change in the optical property, the refractive index. An experiment has been done for three different concentrations of hydrogen peroxide. Distilled water was taken as a base reference for the plot. The test liquid was made to flow through a glass tube, and the refractive index was measured using an IR transceiver setup. The values obtained using NI-cDAQ for various concentrations are compared. These concentration variations detected by the sensor is accurate and precise. The sensor will be cost effective when compared to the ones available commercially.
Security framework for net gun-equipped unmanned aerial vehicles K Kesavaraj, N Mithran, M Venkatesan, R Vinoth, NA Dhamodharan, ... AIP Conference Proceedings 2914 (1), 040005 , 2023 2023 Citations: 4
Shape and size effects of glass mini-channels on infrared sensors in air–water two-phase flow N Mithran, K Sowndarya, M Venkatesan Recent advances in fluid dynamics: select proceedings of ICAFFTS 2021, 309-323 , 2022 2022 Citations: 2
Concentration measurement of a mixture using an infrared transceiver S Seetharaman, PS Krishna, N Mithran, M Venkatesan Flow Measurement and Instrumentation 80, 101974 , 2021 2021
Signal characteristics of IR transceiver pair during two phase flow of varying liquid film thickness in a mini-channel N Mithran, M Venkatesan Chemical Engineering Communications 208 (6), 870-882 , 2021 2021 Citations: 4
Volumetric reconstruction of taylor slug gas flow using IR transceiver in minichannels N Mithran, M Venkatesan IEEE Transactions on Instrumentation and Measurement 69 (6), 3818-3825 , 2019 2019 Citations: 15
Attenuation and shape effects on IR transceiver irradiation behaviour during air–hydrogen peroxide two-phase flow MV N. Mithran, S. Aafrin Sulthana Chemical Papers , 2019 2019
Image Processing Technique for slug length measurement during Mixing and Separation of Two-phase Flows in T sections R Kumar, N Mithran, SK Thirumalaikumaran, M Venkatesan Materials Today: Proceedings 16, 738-743 , 2019 2019 Citations: 2
Phase split in T-junction mini channel–A numerical study R Kumar, M N, V Muniyandi Chemical Product and Process Modeling 13 (2), 20170012 , 2018 2018 Citations: 3
IR transceiver irradiation characteristics on bubble/slug flow regimes in conventional and minichannels N Mithran, V Muniyandi IEEE Transactions on Instrumentation and Measurement 68 (1), 240-249 , 2018 2018 Citations: 12
A note on using VOF method for polymer bead manufacturing SK Thirumalaikumaran, N Mithran, R Suwathy, M Venkatesan International Journal of Plastics Technology 22 (1), 170-176 , 2018 2018 Citations: 2
Effect of self re-wetting fluids on bubble coalescence KU Aruli, S Anand, K Shrivignesh, N Mithran, M Venkatesan Proceedings of the national conference on critical heat flux and multiphase … , 2018 2018
Enhancement of heat transfer in phase change material using graphite-paraffin composites R Sathiyaraj, R Rakesh, N Mithran, M Venkatesan MATEC Web of Conferences 172, 02001 , 2018 2018 Citations: 8
Slug-bubble regime identification in a square channel using a IR Sensor S Aafrin Sulthana, T Marieswaran, N Braghadesh, N Mithran, ... MATEC Web of Conferences 172, 01002 , 2018 2018 Citations: 4
Enhancement of heat transfer in phase change material using graphite-paraffin composites VM Sathiyaraj R, Rakesh R, Mithran N 3rd International Conference on Design, Analysis, Manufacturing and … , 2018 2018
Measurement of hydrogen peroxide concentration using IR sensor – A numerical model VM Vijaya Raghavan S, Siva P. M., Neethish Kannaa S.P., Mohith P., Mithran N. 3rd International Conference on Design, Analysis, Manufacturing and … , 2018 2018
Slug-bubble regime identification in a square channel using a IR Sensor MV S. Aafrin Sulthana, T. Marieswaran, N, Braghadesh, N. Mithran 3rd International Conference on Design, Analysis, Manufacturing and … , 2018 2018
Concentration variation detection of Hydrogen peroxide using an IR sensor P Mohith, SV Raghavan, PM Siva, N Mithran, M Venkatesan 2017 IEEE International Conference on Computational Intelligence and … , 2017 2017 Citations: 2
Integration of Hall Sensor in a 3D Printer as a Limit Switch T Subhasankari, AS Infant, A Viswasundar, M Venkatesan, N Mithran 2017 IEEE International Conference on Computational Intelligence and … , 2017 2017 Citations: 5
Effect of IR Transceiver orientation on gas/liquid two-phase flow regimes N Mithran, M Venkatesan Flow Measurement and Instrumentation 58, 12-20 , 2017 2017 Citations: 18
Non-invasive Infrared glucometer MV S. Divya, S. Kausalya, N. Mithran International conference on Systems Design and Engineering, SASTRA Deemed … , 2017 2017
MOST CITED SCHOLAR PUBLICATIONS
Effect of IR Transceiver orientation on gas/liquid two-phase flow regimes N Mithran, M Venkatesan Flow Measurement and Instrumentation 58, 12-20 , 2017 2017 Citations: 18
Volumetric reconstruction of taylor slug gas flow using IR transceiver in minichannels N Mithran, M Venkatesan IEEE Transactions on Instrumentation and Measurement 69 (6), 3818-3825 , 2019 2019 Citations: 15
IR transceiver irradiation characteristics on bubble/slug flow regimes in conventional and minichannels N Mithran, V Muniyandi IEEE Transactions on Instrumentation and Measurement 68 (1), 240-249 , 2018 2018 Citations: 12
Enhancement of heat transfer in phase change material using graphite-paraffin composites R Sathiyaraj, R Rakesh, N Mithran, M Venkatesan MATEC Web of Conferences 172, 02001 , 2018 2018 Citations: 8
Design and Development of Cartesian Robot for Machining with Error Compensation and Chatter Reduction N Mithran, R Gangadevi International Journal of Engineering Research and Technology. International … , 2013 2013 Citations: 7
Droplet impinging behavior on surfaces: Part II-Water on aluminium and cast iron surfaces S Sangavi, S Balaji, N Mithran, M Venkatesan IOP Conference Series: Materials Science and Engineering 149 (1), 012220 , 2016 2016 Citations: 6
Integration of Hall Sensor in a 3D Printer as a Limit Switch T Subhasankari, AS Infant, A Viswasundar, M Venkatesan, N Mithran 2017 IEEE International Conference on Computational Intelligence and … , 2017 2017 Citations: 5
Security framework for net gun-equipped unmanned aerial vehicles K Kesavaraj, N Mithran, M Venkatesan, R Vinoth, NA Dhamodharan, ... AIP Conference Proceedings 2914 (1), 040005 , 2023 2023 Citations: 4
Signal characteristics of IR transceiver pair during two phase flow of varying liquid film thickness in a mini-channel N Mithran, M Venkatesan Chemical Engineering Communications 208 (6), 870-882 , 2021 2021 Citations: 4
Slug-bubble regime identification in a square channel using a IR Sensor S Aafrin Sulthana, T Marieswaran, N Braghadesh, N Mithran, ... MATEC Web of Conferences 172, 01002 , 2018 2018 Citations: 4
Phase split in T-junction mini channel–A numerical study R Kumar, M N, V Muniyandi Chemical Product and Process Modeling 13 (2), 20170012 , 2018 2018 Citations: 3
Shape and size effects of glass mini-channels on infrared sensors in air–water two-phase flow N Mithran, K Sowndarya, M Venkatesan Recent advances in fluid dynamics: select proceedings of ICAFFTS 2021, 309-323 , 2022 2022 Citations: 2
Image Processing Technique for slug length measurement during Mixing and Separation of Two-phase Flows in T sections R Kumar, N Mithran, SK Thirumalaikumaran, M Venkatesan Materials Today: Proceedings 16, 738-743 , 2019 2019 Citations: 2
A note on using VOF method for polymer bead manufacturing SK Thirumalaikumaran, N Mithran, R Suwathy, M Venkatesan International Journal of Plastics Technology 22 (1), 170-176 , 2018 2018 Citations: 2
Concentration variation detection of Hydrogen peroxide using an IR sensor P Mohith, SV Raghavan, PM Siva, N Mithran, M Venkatesan 2017 IEEE International Conference on Computational Intelligence and … , 2017 2017 Citations: 2
Image processing algorithm for droplet measurement after impingement B Tejaswi, PS Sivasakthivel, M Venkatesan 2016 IEEE International Conference on Computational Intelligence and … , 2016 2016 Citations: 2
Concentration measurement of a mixture using an infrared transceiver S Seetharaman, PS Krishna, N Mithran, M Venkatesan Flow Measurement and Instrumentation 80, 101974 , 2021 2021
Attenuation and shape effects on IR transceiver irradiation behaviour during air–hydrogen peroxide two-phase flow MV N. Mithran, S. Aafrin Sulthana Chemical Papers , 2019 2019
Effect of self re-wetting fluids on bubble coalescence KU Aruli, S Anand, K Shrivignesh, N Mithran, M Venkatesan Proceedings of the national conference on critical heat flux and multiphase … , 2018 2018
Enhancement of heat transfer in phase change material using graphite-paraffin composites VM Sathiyaraj R, Rakesh R, Mithran N 3rd International Conference on Design, Analysis, Manufacturing and … , 2018 2018
