Search results for: Vivek V. Ranade

Items from 1 to 20 out of 53 results

article

Flow physics of planar bistable fluidic oscillator with backflow limbs

Ketan Madane, Chirag Khalde, Ajinkya Pandit, Vivek V. Ranade

Fluidic oscillators (FOs) are used in a variety of applications, including process control and process intensification. Despite the simple design and operation of FOs, the fluid dynamics of FOs exhibit rich complexities. The inherently unstable flow, jet oscillations, and resulting vortices influence mixing and other transport processes. In this work, we computationally investigated the fluid dynamics...

article

Drop breakage in a single‐pass through vortex‐based cavitation device: Experiments and modeling

Abhijeet H. Thaker, Vivek V. Ranade

AIChE Journal > 69 > 1 > n/a - n/a

Liquid–liquid emulsions are used in many sectors such as personal care, home care, and food products. There is an increasing need for developing compact and modular devices for producing emulsions with desired droplet size distribution (DSD). In this work, we have experimentally and computationally investigated an application of vortex‐based hydrodynamic cavitation (HC) device for producing emulsions...

article

Sugarcane bagasse valorization to xylitol: Techno‐economic and life cycle assessment

Arun Shaji, Yogendra Shastri, Vinod Kumar, Vivek V. Ranade, more

Biofuels, Bioproducts and Biorefining > 16 > 5 > 1214 - 1226

A detailed techno‐economic analysis and life cycle assessment (LCA) of a novel bio‐refinery that produces xylitol from sugarcane bagasse are provided. The proposed process includes dilute acid pretreatment in pressurized conditions followed by fermentation (upstream section). The fermentation broth is then sent for separation and purification to the downstream section. Calculations are performed for...

article

A novel hybrid cavitation process for enhancing and altering rate of disinfection by use of natural oils derived from plants

Maya B. Mane, Vinay M. Bhandari, Kshama Balapure, Vivek V. Ranade

Ultrasonics Sonochemistry > 2020 > 61 > C

The present study is an attempt to improvise the hydrodynamic cavitation methodology for effective disinfection of water and also to suggest prototype development for practical application. The enhancement in the disinfection efficiency was evaluated specifically for the effect of pressure, temperature, pH, microbial inoculum size and also on effect of different additives for the two model microbial...

article

Flow characteristics of vortex based cavitation devices

Alister Simpson, Vivek V. Ranade

AIChE Journal > 65 > 9 > n/a - n/a

Vortex based hydrodynamic cavitation (HC) devices offer various advantages over conventional linear flow devices, such as early inception, low erosion risk, and higher cavitational yield. Despite several promising applications, the key underlying flow characteristics are not yet adequately understood. This article presents results of a computational investigation into cavitation in vortex devices...

article

Flow, mixing, and heat transfer in fluidic oscillators

Chirag M. Khalde, Ajinkya V. Pandit, Jitendra S. Sangwai, Vivek V. Ranade

The Canadian Journal of Chemical Engineering > 97 > 2 > 542 - 559

There is an increasing emphasis on process intensification and development of compact, intensified reactors and separators in recent years. Significant efforts are being made to develop such intensified reactors and separators without any moving parts. Some of the recent research studies have proven that a liquid‐liquid extractor based on the Coanda effect and feedback oscillations exhibit excellent...

article

CFD in Chemical Engineering: Process Design Symposium at the 10^th World Congress of Chemical Engineering (WCCE10)

José Roberto Nunhez, Jos J. Derksen, Vivek V. Ranade

The Canadian Journal of Chemical Engineering > 97 > 2 > 442 - 443

article

CFD modelling of almond drying in a tray dryer

Amarvir G. Chilka, Vivek V. Ranade

The Canadian Journal of Chemical Engineering > 97 > 2 > 560 - 572

Drying is important in many food processing applications, and particularly so in the dry fruits industry. This work is focused on developing computational models for simulating the drying of almonds in a tray dryer. It is important to quantitatively understand heat and mass transfer within and around a single almond particle as well as the particle‐particle interactions and their implications for...

article

Modeling hydrodynamic cavitation in venturi: influence of venturi configuration on inception and extent of cavitation

Alister Simpson, Vivek V. Ranade

AIChE Journal > 65 > 1 > 421 - 433

Hydrodynamic cavitation (HC) is useful for intensifying a wide variety of industrial applications including biofuel production, emulsion preparation, and wastewater treatment. Venturi is one of the most widely used devices for HC. Despite the wide spread use, the role and interactions among various design and operating parameters on generated cavitation is not yet adequately understood. This article...

article

Solvent degradation studies using hydrodynamic cavitation

Pravin G. Suryawanshi, Vinay M. Bhandari, Laxmi Gayatri Sorokhaibam, Jayesh P. Ruparelia, more

Environmental Progress & Sustainable Energy > 37 > 1 > 295 - 304

Hydrodynamic cavitation for the degradation of organic solvents was investigated in detail using a newer form of cavitating device‐vortex diode. The results were also compared with that using conventional cavitating device orifice. Removal of three different organic solvents—acetone, methyl ethyl ketone (MEK), and toluene were studied on a pilot plant with capacity of 1 m³/h. The effect of different...

article

Developing techno-economically sustainable methodologies for deep desulfurization using hydrodynamic cavitation

Nalinee B. Suryawanshi, Vinay M. Bhandari, Laxmi Gayatri Sorokhaibam, Vivek V. Ranade

Fuel > 2017 > 210 > C > 482-490

The present work, for the first time, describes the efficacy of the cavitation process and compares the cavitation yield for two types of cavitation devices-one employing linear flow for the generation of cavities and other employing vortex flow. The process involves pre-programmed mixing of the organic and aqueous phases, and can be carried out using simple mechanical cavitating devices such as orifice...

article

Electrical resistance tomography for gas holdup in a gas-liquid stirred tank reactor

Madhavi V. Sardeshpande, Suraj Gupta, Vivek V. Ranade

Chemical Engineering Science > 2017 > 170 > C > 476-490

Gas-Liquid flows in stirred tank reactors (STR) are used in many significant industrial operations such as hydrogenation, absorption, stripping, oxidation, hydrogenation, ozonation, chlorination, fermentation, etc. Gas-Liquid STRs are expected to perform several functions such as mixing, dispersing gas into liquid, mass and heat transfer and reactions. Gas hold up distribution and various flow regimes...

article

Estimation of gas induction in jet loop reactors: Influence of nozzle designs

Deepankar V. Sharma, Ashwin W. Patwardhan, Vivek V. Ranade

Chemical Engineering Research and Design > 2017 > 125 > C > 24-34

Jet loop reactors are used widely for conducting gas liquid reactions because of the high mass transfer achieved in the gas–liquid ejector. Studies have shown that the mass transfer has a very strong correlation to the amount of gas induced in the ejector, and hence it is important to understand gas induction to enhance the performance of any gas–liquid nozzle. In this work, we used a single phase...

article

MgFeCe Ternary Layered Double Hydroxide as Highly Efficient and Recyclable Heterogeneous Base Catalyst for Synthesis of Dimethyl Carbonate by Transesterification

Nayana T. Nivangune, Vivek V. Ranade, Ashutosh A. Kelkar

Catalysis Letters > 2017 > 147 > 10 > 2558-2569

A series of Mg₃:Fe_x + Ce_1−x LDHs (3:1) were synthesized by co-precipitation method by varying molar ratio of Fe:Ce between 1:0 to 0:1 (LDH-1 to LDH-6). All synthesized LDHs were characterized by XRD, FT-IR, TEM, N₂ sorption, benzoic acid titration and XPS in detail and evaluated for selective synthesis of dimethyl carbonate by transesterification of ethylene carbonate with methanol. It was demonstrated...

article

Chord length distribution to particle size distribution

Ajinkya V. Pandit, Vivek V. Ranade

AIChE Journal > 62 > 12 > 4215 - 4228

A simple model is presented to extract the particle size distribution (PSD) from the chord length distribution measured using a focused beam reflectance measurement probe. The model can be implemented using simple spread sheeting tools and does not require the description of additional parameters as opposed to previous models. The model was validated for two systems consisting of spherical ceramic...

article

Two-phase flow boiling pressure drop in small channels

Madhavi V. Sardeshpande, Parikshit Shastri, Vivek V. Ranade

International Journal of Heat and Fluid Flow > 2016 > 61 > PB > 636-649

Two-phase flow boiling in small channels finds a variety of applications in power and process industries. Heat transfer, boiling flow regimes, flow instabilities, pressure drop and dry out are some of the key issues related to two-phase flow boiling in channels. In this work, the focus is on pressure drop in two-phase flow boiling in tubes of 19mm diameter. These tubes are typically used in steam...

article

Two‐phase flow boiling in 19 mm tube: Experiments and CFD modelling

Madhavi V. Sardeshpande, Barlev Raymond, Vivek V. Ranade

The Canadian Journal of Chemical Engineering > 94 > 5 > 872 - 885

Boiling flows are encountered in a wide range of industrial applications such as boilers, nuclear reactors, electronic cooling, and various types of chemical reactors. Heat transfer coefficients, flow boiling regimes, flow instabilities, pressure drops, and conditions like dry‐out are some of the key issues in every boiling flow study. It is observed that a limited experimental database is available...

article

Mixing studies in unbaffled stirred tank reactor using electrical resistance tomography

Madhavi V. Sardeshpande, Gaurav Kumar, T. Aditya, Vivek V. Ranade

Flow Measurement and Instrumentation > 2016 > 47 > C > 110-121

Unbaffled stirred tanks are extensively used in chemical process industries for variety of applications including semi-batch reactions. In un-baffled stirred tanks, impeller rotation generates a vortex and reactants are added into this vortex. There is a growing interest towards understanding the mixing performance of such unbaffled stirred vessels. The present work is aimed at providing experimental...

article

Processing of TGA data: Analysis of isoconversional and model fitting methods

Ankit A. Jain, Anurag Mehra, Vivek V. Ranade

Fuel > 2016 > 165 > C > 490-498

Thermogravimetric analysis (TGA) is routinely used to characterize coal. Apart from proximate analysis, TGA data is also used to characterize kinetics of devolatilization and char combustion. Various methods have been proposed to process the TGA data [isoconversional or model free methods such as Friedman method, Kissinger method, Flynn–Wall–Ozawa method (FWO), Kissinger–Akahira–Sunose method (KAS)...

article

CRE for MAGIC (modular, agile, intensified & continuous) processes

Vivek V. Ranade, Mrityunjay K. Sharma, Amol A. Kulkarni

Chemical Engineering Journal > 2015 > 278 > C > 454-468

Fine and specialty chemical industry caters to several key applications required for maintaining and enhancing quality of life. Most of these fine and specialty chemicals are still manufactured in stirred tank reactors operated in batch or semi-batch modes. A paradigm shift is necessary to transform these into new age, efficient and continuous processes and plants. In this paper, recent attempts of...

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INFONA - science communication portal

Search results for: Vivek V. Ranade

Flow physics of planar bistable fluidic oscillator with backflow limbs

Drop breakage in a single‐pass through vortex‐based cavitation device: Experiments and modeling

Sugarcane bagasse valorization to xylitol: Techno‐economic and life cycle assessment

A novel hybrid cavitation process for enhancing and altering rate of disinfection by use of natural oils derived from plants

Flow characteristics of vortex based cavitation devices

Flow, mixing, and heat transfer in fluidic oscillators

CFD in Chemical Engineering: Process Design Symposium at the 10^th World Congress of Chemical Engineering (WCCE10)

CFD modelling of almond drying in a tray dryer

Modeling hydrodynamic cavitation in venturi: influence of venturi configuration on inception and extent of cavitation

Solvent degradation studies using hydrodynamic cavitation

Developing techno-economically sustainable methodologies for deep desulfurization using hydrodynamic cavitation

Electrical resistance tomography for gas holdup in a gas-liquid stirred tank reactor

Estimation of gas induction in jet loop reactors: Influence of nozzle designs

MgFeCe Ternary Layered Double Hydroxide as Highly Efficient and Recyclable Heterogeneous Base Catalyst for Synthesis of Dimethyl Carbonate by Transesterification

Chord length distribution to particle size distribution

Two-phase flow boiling pressure drop in small channels

Two‐phase flow boiling in 19 mm tube: Experiments and CFD modelling

Mixing studies in unbaffled stirred tank reactor using electrical resistance tomography

Processing of TGA data: Analysis of isoconversional and model fitting methods

CRE for MAGIC (modular, agile, intensified & continuous) processes

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