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Chem Engg

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Professor

Narasimha Mangadoddy

A-305
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PhD: Ph.D, JKMRC University of Queensland
Research Interests: Particulate Technology, Mineral Processing, Industrial CFD/DEM, Experimental Fluid Mechanics
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“Understanding the interaction of different phases during the transport processes and separations is an important aspect, provides the scope for thorough insights and new efficient separation devices.”

Research Overview

The broad application of computational techniques such as CFD and DEM to particulate flows in chemical, mineral processing, and energy industries has a huge potential to understand the fundamental flow behavior, particle/disperse phase dynamics and influence of turbulence on separations. We also focus on experimental investigation of the phasic information utilizing process tomography (ERT, PEPT) and imaging techniques.

Research Highlights

Development and application the multi-phase computational models for mineral processing and particulate flows is challenging due to complex interaction of phases apart from their anisotropic turbulence. We develop these via CFD, DEM and coupled approaches.

Characterizing particulate flows is quite difficult due to its opaque and involved phasic interaction. We seek to measure these via process tomography such as Electrical Resistance Tomography (ERT) and Positron Emission Particle Tracking (PEPT) and imaging.

Most of the mineral separation units are designed vis trail and error or correlations based. We seek to develop new improved designs using multi-phase CFD and systematic experimental methods. Industrial Cyclones & spirals for coal separation, classification and gravity separation are made via this route.

Currently single avg. density mathematical modes (gravity spns). Multi-component performance models are necessary for performance prediction. We seek to simulate and understand the interactions between the different components using experimental and multiphase CFD methods, which may lead us to develop an improved mathematical models.

Associated Projects

Ongoing

CVD, DE Hydrocyclone modelling (P.O.No: 111418 & Dt: 14.04.2025)

Start Year: 2025

Sponsor: The Weirn Group PLC-Glasgow

Co-PI: Dr.Phanindra Jampana

Ongoing

Dense Medium cyclones modelling (P.O.No: 111418 & Dt: 14.04.2025)

Start Year: 2025

Sponsor: The Weirn Group PLC-Glasgow

Ongoing

Development of cold plasma treatment-based technology for coal to improve its floatation performance and process yield PO:- 3000169771/132 & Dt: 05.03.2024

Start Year: 2023

Sponsor: TATA STEEL

Ongoing

Feasibilty study of separation of grphaite from Lead concentrate using the water only cyclone

Start Year: 2019

Sponsor: Hindustan Zinc

Completed

Design Modifications of TATA-JK Dense Medicum Cyclone for the efficient separation of Middling coal using CFD

Start Year: 2019

Sponsor: Tata Steel limited

Completed

CFD Modelling of Fluid Flow in Air pollution control equipment (ESP, Bag filter, Cyclones, Scrubber, Centrifugal fans)

Start Year: 2017

Sponsor: Clairs Engineers Pvt. Ltd.

Completed

Consultancy charges for Minimization of Fines and Coarse particles in the products of Quartz ore closed Ball Mill-Air classifier circuit using CFD Modelling & Simulation Approach

Start Year: 2021

Sponsor: M/s CHETTINAD MORIMURA SEMICONDUCTOR MATERIAL PRIVATE LIMITED

Completed

Recovery of galena,sphalerite from lead zinc tailings by integrated energy efficient ultrafine comminution and novel shear floc-flotation and its impact on downstream Paste fill

Start Year: 2021

Sponsor: Ministry of Mines,Government of India & hindustan zinc limited

Co-PI: Dr. Praveen Meduri,IITH & Dr. Eswaraiah, CSIR- IMMT

Ongoing

Development and Application of a GPU Based Coupled DEM-CFD Model for Predicting non-spherical Particle Dynamics and Performance of Mineral Processing Unit

Start Year: 2020

Sponsor: SERB

Ongoing

Improving the efficiency of spiral concentrator separating the multi-component chromite ore particles using CFD and experimental methods

Start Year: 2018

Sponsor: MHRD /

Co-PI: Dr. Vinod Janardhanan

Selected Publications

Column flotation hydrodynamics in heterogeneous regime using ERT and CFD model

P Kopparthi; B Vadlakonda; N Mangadoddy

Journal: International Journal of Coal Preparation and UtilizationYear: 2025DOI: 10.1080/19392699.2024.2382781

A classification model concept for multi-component hydrocyclone performance

M Narasimha; A N Mainza; P Mandakini

Journal: Mineral Processing and Extractive MetallurgyYear: 2025DOI: 10.1177/25726641251357075

GPU based discrete element modeling for convex polyhedral shape particles: Development and validation

Aman Mittal; Narasimha Mangadoddy; Raja Banerjee

Journal: Powder TechnologyYear: 2025DOI: 10.1016/j.powtec.2024.120407

A coupled CFD–DEM model for tumbling mill dynamics—Effect of lifter profile

Aman Mittal; Mayank Kumar; Narasimha Mangadoddy

Journal: Powder TechnologyYear: 2024DOI: 10.1016/j.powtec.2023.119178

Numerical modelling of two-phase flow hydrodynamics of column flotation - validation against ERT data

Vadlakonda, B.; Kopparthi, P.; Mangadoddy, N.

Journal: International Journal of Coal Preparation and UtilizationYear: 2023DOI: 10.1080/19392699.2023.2280659

Features of near gravitational material tracers in a dense medium cyclone from PEPT

Richter, M. C.; Mainza, A. N.; Govender, I.; Mangadoddy, N.; Sivakumar, R.; Sreedhar, G. E.; van Heerden, M. R.

Journal: Powder TechnologyYear: 2023DOI: 10.1016/j.powtec.2022.118095

GPU-based DEM code for mineral processing

Mittal A.; Mangadoddy N.; Banerjee R.

Journal: Computational Particle MechanicsYear: 2023DOI: 10.1007/s40571-023-00571-4

Numerical modelling in mineral processing

Rajendran S.; Reddy T.; Mangadoddy N.

Journal: Mineral Processing (Book Chapter)Year: 2023DOI: 10.1016/B978-0-12-823149-4.00012-0

CFD modelling of hydrocyclones

Vakamalla T. R.; Rajendran S.; Padhi M.; Mangadoddy N.

Journal: Mineral Processing (Book Chapter)Year: 2023DOI: 10.1016/B978-0-12-823149-4.00001-6

Numerical modelling of dense medium cyclones

Reddy T.; Mangadoddy N.

Journal: Mineral Processing (Book Chapter)Year: 2023DOI: 10.1016/B978-0-12-823149-4.00006-5