Dr A Guha
Senior Lecturer
Dr Guha obtained a Bachelor of Engineering degree from Jadavpur University and a Master of Engineering from the Indian Institute of Science. He then went to Trinity College, Cambridge, holding the Prince of Wales Scholarship (one scholarship across all disciplines awarded to the best candidate of Commonwealth countries) and an Honorary Nehru Scholarship (India), and received his PhD from the Engineering department of University of Cambridge. He was a Senior Rouse Ball Scholar at Trinity College during 1989-90. In 1990 he became a Fellow of Gonville & Caius College, Cambridge. While at Cambridge, his research was based at the Whittle Laboratory. In 1995 he joined the Aerospace Engineering department of the University of Bristol. He became a Senior Lecturer in 2003.
His research interests lie in the areas of fluid dynamics and thermodynamics of two-phase flow, gas turbine cycles, and computational fluid dynamics. He is the recipient of the first-ever Teaching Excellence Award 2003 for the whole of Faculty of Engineering comprising six departments. University of Bristol has introduced this scheme in 2003 and awards this prize to one member in each faculty.
In 1995 he delivered the prestigious VKI Lecture Series. In 2000 he was elected to the Editorial Board of Journal of Aerosol Science. He has delivered Keynote Lectures at International conferences, including the 2002 ASME/ISHMT international conference on Heat and Mass Transfer. He is a regular reviewer for several international journals.
Research
Dr Guha is a member of the Aerodynamics and Fluid Dynamics Group. His research interests lie in the broad area of Thermo-fluid Dynamics; three main topics being Multiphase Flow, Heat and Mass Transfer, Gas Turbine Performance and Optimisation.
Multiphase Flow (CFD and Analysis)
Overview
The department has a strong base for research in multiphase flows. Previous successful projects covered diverse topics of engineering as well as of fundamental importance. The outcome of these projects has appeared in seminal Journals and major conferences.
The primary activities concern modelling the flow of multiphase mixtures - either solid-particle-laden-gases or vapour-droplet mixtures, e.g. moist air, - through a combination of numerical calculations (Computational Fluid Dynamics) and theoretical analysis. This is an interdisciplinary research area requiring synthesis of ideas from several fields such as fluid mechanics, thermodynamics, and, heat and mass transfer.
Examples of previous successful projects include:
- Formulation of a unified theory and an extremely efficient calculation method of particle deposition in a turbulent flow field
- Application of CFD for predicting oscillating and moving shock waves in two-phase mixtures
- Development of CFD codes for predicting the flow of wet steam
- Fundamental studies of relaxation gas dynamics and structure of shock waves in vapour-droplet flow
- Development of a theory and tools for interpreting total pressure and total temperature in multiphase flow
- Development of a new theory (based on Monte-Carlo simulation) of nucleation of water droplets in large, multistage steam turbines responsible for 80% of world-wide electricity generation.
The research interest in multiphase flows is also shared by other departments in the faculty.
Topics of Continuing Interest
- CFD application of the theory of turbulent transport of particles
- Computation (CFD) of turbulent deposition on turbine blades
- Development of a Navier-Stokes solver for two-phase flow
More Details
Example Imaging for a turbine blade.
Mach Contour
Wetness Fraction Contour
Heat and Mass Transfer
Topics of Current Interest:
- Analysis of mass, momentum and energy transfers between particles or droplets and the surrounding vapour (or gas)
- Design and analysis of novel heat exchangers with radically improved energy transfer rate
- Analysis of the cooling of turbine blades in aero gas turbines. (This work is being conducted in collaboration with Rolls-Royce.)
Gas Turbine Performance and Optimisation
Overview
- A systematic methodology for the thermodynamic optimisation of civil bypass engines (turbofan or advanced propulsors) has been developed.
- Work in progress: Analysis of the cooling of turbine blades in aero gas turbines. (This work is being conducted in collaboration with Rolls-Royce.)
Further Detail: Optimisation of aero gas turbine engines To;
Topics with Representative Publications by A. Guha
Click on the appropriate publications for details
| Topics | Representative Publications | |
|---|---|---|
 |
CFD of Transonic Single-Phase Flow | Implicit numerical simulation of transonic flow through turbine cascades on unstructured grids, IMechE Proc., Part A, J. Power and Energy, vol 219, no A1, 2005, p. 35-47. |
 |
Turbulent Transport of Particles | A unified Eulerian theory of turbulent deposition to smooth and rough surfaces, J. Aerosol Science, vol. 28, no. 8, 1997, p. 1517-1537. |
|
Optimisation and Performance of Gas Turbine Engines | Optimisation of aero gas turbine engines, Aeronautical Journal, vol. 105, no. 1049, July 2001, p. 345-358. Performance and optimisation of gas turbines with real gas effects, IMechE Proc., Part A, J. Power and Energy, vol 215, no A4, 2001, p. 507-512. An efficient generic method for calculating the properties of combustion products, IMechE Proc., Part A, J. Power and Energy, vol. 215, no. A3, 2001, p. 375-387. Optimum fan pressure ratio for bypass engines with separate or mixed exhaust streams, AIAA J Propulsion and Power, vol 17, no. 5, Sept-Oct 2001, p.1117-1122. Effects of internal combustion and non-perfect gas properties on the optimum performance of gas turbines, IMechE Proc., Part C, J. Mechanical Engineering Science, vol 217, no A4, 2003, p. 1085-1099. |
|
CFD of Two-phase Flow | Two-Phase Flows with Phase Transition, In VKI Lecture Series 1995-06, von Karman Institute for Fluid Dynamics, Belgium, 1995, p 1-110. Time-marching prediction of unsteady condensation phenomena due to supercritical heat addition, In Turbomachinery : Latest Developments in a Changing Scene, London, IMechE, 1991, p. 167-177. (ISBN 0852987617) |
|
CFD of Moving Shock Waves | Stationary and moving normal shock waves in wet steam, In Adiabatic Waves in Liquid-Vapour Systems, (ed. G.E.A. Meier and P.A. Thompson), Springer Verlag, 1990, p 159-170. |
|
Novel Theory of Nucleation (with CFD) | The effect of flow unsteadiness on the homogeneous nucleation of water droplets in steam turbines, Philosophical Transactions A of The Royal Society, vol. 349, 1994, p. 445-472. |
|
Relaxation Processes & Structure of Shock Waves | A unified theory of aerodynamic and condensation shock waves in vapour-droplet flows with or without a carrier gas, Physics of Fluids, vol 6, no 5, 1994, p 1893-1913. Normal shock wave structure in two-phase vapour-droplet flows, Journal of Fluid Mechanics, vol. 228, 1991, p 243-274. The physics of relaxation processes and of stationary and non-stationary shock waves in vapour-droplet flows, In Transport Phenomena in Heat and Mass Transfer (ed. J.A. Reizes), Elsevier, 1992, p 1404-1417. Structure of partly dispersed normal shock waves in vapour-droplet flows, Physics of Fluids A, vol 4, no 7, 1992, p 1566-1578. |
|
Rankine Hugoniot Relations | Jump conditions across normal shock waves in pure vapour-droplet flows, Journal of Fluid Mechanics, vol 241,1992, p 349-369. A unified theory of aerodynamic and condensation shock waves in vapour-droplet flows with or without a carrier gas, Physics of Fluids, vol 6, no 5, 1994, p 1893-1913. |
|
Total Pressure and Temperature in Two-phase Flows | A unified theory for the interpretation of total pressure and temperature in two-phase flows at subsonic and supersonic speeds, Proceedings of the Royal Society, vol. 454, 1998, p. 671-695. |
 |
Thermal Choking | Thermal choking due to non-equilibrium condensation, ASME Journal of Fluids Engineering, vol. 116, 1994, p 599-604. |
|
Novel Heat Exchangers | Overview of the Development of Heat Exchangers for Use in Air-Breathing Propulsion Pre-Coolers, Acta Astronautica, vol. 41, no. 11, 1997, p. 723-729 |
|
Solar Energy | The effect of bottom reflectivity on the performance of a solar pond, Solar Energy, vol. 39, no. 4, 1987, p 361-367. Concentration profile in the gradient zone of small solar ponds, Solar Energy, vol. 38, no. 2, 1987, p 135-136. |
Publications List
Academic Journals
| Link | Details |
|---|---|
|
Y Mei & A Guha, "Implicit numerical simulation of transonic flow through turbine cascades on unstructured grids", IMechE Proc., Part A, J. Power and Energy, vol 219, no A1, 2005, p. 35-47. (13 pages) |
|
Single-authored, A Guha, "Effects of internal combustion and non-perfect gas properties on the optimum performance of gas turbines", IMechE Proc., Part C, J. Mechanical Engineering Science, vol 217, no A4, 2003, p. 1085-1099. (15 pages) |
Details |
Single-authored, A Guha, "Optimisation of aero gas turbine engines", The Aeronautical Journal, vol.105 , No. 1049 , July 2001, p. 345-358. (14 pages) |
|
Single-authored, A Guha, "Optimum fan pressure ratio for bypass engines with separate or mixed exhaust streams", AIAA J. Propulsion and Power, vol 17, no. 5, Sept-Oct 2001, p.1117-1122. |
Details |
Single-authored, A Guha, "Performance and optimisation of gas turbines with real gas effects", IMechE Proc., Part A, J. Power and Energy, vol 215, no A4, 2001, p. 507-512. |
Details |
Single-authored, A Guha, "An efficient generic method for calculating the properties of combustion products", IMechE Proc., Part A, J. Power and Energy, vol. 215 , No. A3 , 2001, p. 375-387. (13 pages) |
Details |
Single-authored, A Guha, "Computation, analysis and theory of two-phase flows", The Aeronautical Journal, vol. 102, No. 1012, 1998, p. 71-82. (12 pages) |
Details |
Single-authored, A Guha, "A simple, analytical theory for interpreting measured total pressure in multiphase flows", ASME J. Fluids Engg., vol. 120, June 1998, p 385-389. |
Details |
Single-authored, A Guha, "A unified theory for the interpretation of total pressure and temperature in two-phase flows at subsonic and supersonic speeds", Proceedings of the Royal Society, vol. 454, 1998, p. 671-695. (25 pages) |
Details |
J. Murray, A. Guha & A. Bond, "Overview of the Development of Heat Exchangers for Use in Air-Breathing Propulsion Pre-Coolers", Acta Astronautica, vol. 41, no. 11, 1997, p. 723-729 |
|
Single-authored, A Guha, "A unified Eulerian theory of turbulent deposition to smooth and rough surfaces", J. Aerosol Science, vol. 28, no. 8, 1997, p. 1517-1537. (21 pages) |
Details |
Single-authored, A Guha, "Analysis and computation of non-equilibrium two-phase flow", Sadhana (J. Indian Academy of Sciences), vol. 22, part 3, June 1997, p 295-321. (27 pages) |
Details |
Single-authored, A Guha, "Thermal choking due to non-equilibrium condensation", ASME Journal of Fluids Engineering, vol. 116, 1994, p 599-604. |
Details |
A. Guha and S.K. Biswas, "On Leonardo da Vinci’s cat and mouse problem", Bulletin of Institute of Mathematics & Its Applications, Jan/Feb, vol. 30, 1994, p. 12-15. |
Details |
A Guha and J.B. Young, "The effect of flow unsteadiness on the homogeneous nucleation of water droplets in steam turbines", Philosophical Transactions A of The Royal Society, vol. 349, 1994, p. 445-472. (28 pages) |
Details |
Single-authored, A Guha, "A unified theory of aerodynamic and condensation shock waves in vapour-droplet flows with or without a carrier gas", Physics of Fluids, vol 6, no 5, 1994, p 1893-1913. (21 pages) |
Details |
Single-authored, A Guha, "Jump conditions across normal shock waves in pure vapour-droplet flows", Journal of Fluid Mechanics, vol 241,1992, p 349-369. (21 pages) |
Details |
Single-authored, A Guha, "Structure of partly dispersed normal shock waves in vapour-droplet flows", Physics of Fluids A, vol 4, no 7, 1992, p 1566-1578. (13 pages) |
Details |
J.B. Young and A Guha, "Normal shock wave structure in two-phase vapour-droplet flows", Journal of Fluid Mechanics, vol. 228, 1991, p 243-274. (32 pages) |
Details |
J. Srinivasan and A Guha, "Concentration profile in the gradient zone of small solar ponds", Solar Energy, vol. 38, no. 2, 1987, p 135-136. |
Details |
J. Srinivasan and A Guha, "The effect of bottom reflectivity on the performance of a solar pond", Solar Energy, vol. 39, no. 4, 1987, p 361-367. |
|
Y Mei & A Guha, "Implicit numerical simulation of transonic flow through turbine cascades on unstructured grids", IMechE Proc., Part A, J. Power and Energy, vol 219, no A1, 2005, p. 35-47. (13 pages) |
|
Single-authored, A Guha, "Effects of internal combustion and non-perfect gas properties on the optimum performance of gas turbines", IMechE Proc., Part C, J. Mechanical Engineering Science, vol 217, no A4, 2003, p. 1085-1099. (15 pages) |
Details |
Single-authored, A Guha, "Optimisation of aero gas turbine engines", The Aeronautical Journal, vol.105 , No. 1049 , July 2001, p. 345-358. (14 pages) |
|
Single-authored, A Guha, "Optimum fan pressure ratio for bypass engines with separate or mixed exhaust streams", AIAA J. Propulsion and Power, vol 17, no. 5, Sept-Oct 2001, p.1117-1122. |
Details |
Single-authored, A Guha, "Performance and optimisation of gas turbines with real gas effects", IMechE Proc., Part A, J. Power and Energy, vol 215, no A4, 2001, p. 507-512. |
Details |
Single-authored, A Guha, "An efficient generic method for calculating the properties of combustion products", IMechE Proc., Part A, J. Power and Energy, vol. 215 , No. A3 , 2001, p. 375-387. (13 pages) |
Details |
Single-authored, A Guha, "Computation, analysis and theory of two-phase flows", The Aeronautical Journal, vol. 102, No. 1012, 1998, p. 71-82. (12 pages) |
Details |
Single-authored, A Guha, "A simple, analytical theory for interpreting measured total pressure in multiphase flows", ASME J. Fluids Engg., vol. 120, June 1998, p 385-389. |
Details |
Single-authored, A Guha, "A unified theory for the interpretation of total pressure and temperature in two-phase flows at subsonic and supersonic speeds", Proceedings of the Royal Society, vol. 454, 1998, p. 671-695. (25 pages) |
Details |
J. Murray, A. Guha & A. Bond, "Overview of the Development of Heat Exchangers for Use in Air-Breathing Propulsion Pre-Coolers", Acta Astronautica, vol. 41, no. 11, 1997, p. 723-729 |
|
Single-authored, A Guha, "A unified Eulerian theory of turbulent deposition to smooth and rough surfaces", J. Aerosol Science, vol. 28, no. 8, 1997, p. 1517-1537. (21 pages) |
Details |
Single-authored, A Guha, "Analysis and computation of non-equilibrium two-phase flow", Sadhana (J. Indian Academy of Sciences), vol. 22, part 3, June 1997, p 295-321. (27 pages) |
Details |
Single-authored, A Guha, "Thermal choking due to non-equilibrium condensation", ASME Journal of Fluids Engineering, vol. 116, 1994, p 599-604. |
Details |
A. Guha and S.K. Biswas, "On Leonardo da Vinci’s cat and mouse problem", Bulletin of Institute of Mathematics & Its Applications, Jan/Feb, vol. 30, 1994, p. 12-15. |
Details |
A Guha and J.B. Young, "The effect of flow unsteadiness on the homogeneous nucleation of water droplets in steam turbines", Philosophical Transactions A of The Royal Society, vol. 349, 1994, p. 445-472. (28 pages) |
Details |
Single-authored, A Guha, "A unified theory of aerodynamic and condensation shock waves in vapour-droplet flows with or without a carrier gas", Physics of Fluids, vol 6, no 5, 1994, p 1893-1913. (21 pages) |
Details |
Single-authored, A Guha, "Jump conditions across normal shock waves in pure vapour-droplet flows", Journal of Fluid Mechanics, vol 241,1992, p 349-369. (21 pages) |
Details |
Single-authored, A Guha, "Structure of partly dispersed normal shock waves in vapour-droplet flows", Physics of Fluids A, vol 4, no 7, 1992, p 1566-1578. (13 pages) |
Details |
J.B. Young and A Guha, "Normal shock wave structure in two-phase vapour-droplet flows", Journal of Fluid Mechanics, vol. 228, 1991, p 243-274. (32 pages) |
Details |
J. Srinivasan and A Guha, "Concentration profile in the gradient zone of small solar ponds", Solar Energy, vol. 38, no. 2, 1987, p 135-136. |
Details |
J. Srinivasan and A Guha, "The effect of bottom reflectivity on the performance of a solar pond", Solar Energy, vol. 39, no. 4, 1987, p 361-367. |
Edited Books
| Link | Details |
|---|---|
Details |
A Guha and J.B. Young, "Stationary and moving normal shock waves in wet steam", In Adiabatic Waves in Liquid-Vapour Systems, (ed. G.E.A. Meier and P.A. Thompson), Springer Verlag, 1990, p 159-170. (12 pages) |
Details |
A Guha and J.B. Young, "Time-marching prediction of unsteady condensation phenomena due to supercritical heat addition", In Turbomachinery : Latest Developments in a Changing Scene, London, IMechE, 1991, p. 167-177. (ISBN 0852987617) |
Details |
Single-authored, A Guha, "The physics of relaxation processes and of stationary and non-stationary shock waves in vapour-droplet flows", In Transport Phenomena in Heat and Mass Transfer (ed. J.A. Reizes), Elsevier, 1992, p 1404-1417. (14 pages) |
| |
Single-authored, A Guha, "Relaxation and shock wave structures in two-phase vapour-droplet flows", Lectures in a short course on Non-equilibrium Flow with Droplets and Bubbles organized by the Czech Academy of Sciences, Prague, 3 - 8 April, 1993. |
| |
Single-authored, A Guha, "Non-equilibrium multiphase flow", Lectures in a short course on Metastable Behaviour of Fluids and Critical Phenomena organized by the Czech Academy of Sciences, Prague, October 30- November 2, 1994. |
Contents |
Single-authored, A Guha, "Two-phase Flows with Phase Transition", In VKI Lecture Series 1995-06, von Karman Institute for Fluid Dynamics, Belgium, 1995, p 1-110. (110 pages) |
| |
Single-authored, A Guha, "Turbulent transport of particles and a generalized mass transfer law", pp. 29-38, In Heat and Mass Transfer 2002, (Edited by SK Saha, SP Venkateshan, BVSSS Prasad and SS Sadhal), Tata-McGrawHill, New Delhi, p 1446, 2002. (ISBN: 0070474435) |
Conference Contribution (Refereed)
| Link | Details |
|---|---|
Details |
A Guha and J. B. Young, "Time-marching prediction of unsteady condensation phenomena due to supercritical heat addition", Proc. conf. on Turbomachinery : Latest Developments in a Changing Scene, London, IMechE, 1991, p. 167-177. (11 pages.) |
| |
A Guha and J.B. Young, "Stationary and moving normal shock waves in wet steam", (12 pages) IUTAM Symposium on Adiabatic Waves in Liquid-Vapour Systems, Gottingen, 1989. |
| |
Single-authored,
A Guha, "The physics of relaxation processes and of stationary and
non-stationary shock waves in vapour-droplet flows", (14
pages) Int. Symposium in Transport Phenomena (ISTP-IV), University of New South Wales, Sydney, 14-18 July, 1991. |
| |
Single-authored, A Guha, "Analysis and Computation of Non-equilibrium Two-phase Flow", KEYNOTE Lecture at International Conference on Advances in Mechanical Engineering, Golden Jubilee celebration of Mechanical Engineering Department of Indian Institute of Science, Bangalore, 20 - 22 December, 1995, Supplement, p 35 - 53. (19 pages) |
| |
A
Guha, J. Murray & A. Bond, "Overview of the Development of
Heat Exchangers for Use in Air-Breathing Propulsion Pre-Coolers",
Paper IAF-96-S.5.02, 47th International Astronautical Congress, Beijing, China, October 7-11, 1996. |
Details |
Single-authored, A Guha, "On the formation of Droplet Spectra as Measured in Power-Plant Steam Turbines", Proc. International Conference on Fluid Engineering, JSME Centennial Grand Congress, Tokyo, 13 - 16 July, 1997, p 1395 - 1400. |
| |
Single-authored, A Guha, "Turbulent transport of particles and a generalized mass transfer law", KEYNOTE Lecture at ASME/ISHMT International Conference on Heat and Mass Transfer, India, 3-5 January, 2002. |
Keynote Lectures / Invited Short Courses
| Link | Details |
|---|---|
| |
Short Course on Non-equilibrium Flow with Droplets and Bubbles organized by The Czech Academy of Sciences, Prague, 3 - 8 April, 1993. |
| |
Short Course on Metastable Behaviour of Fluids and Critical Phenomena organized by The Czech Academy of Sciences, Prague, October 30 - November 2, 1994. |
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VKI LECTURE SERIES 1995 - 06 on “Two-phase Flows with Phase Transition”, von Karman Institute for Fluid Dynamics, Belgium, 29 May - 1 June, 1995. |
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Keynote Lecture at International Conference on Advances in Mechanical Engineering, Golden Jubilee of Mechanical Engineering Department, Indian Institute of Science, Bangalore, 20 - 22 December, 1995. |
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Invited Lecture (2 hours) at Toshiba Corporation, Yokohama, Japan, 17 July, 1997. |
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Invited Lecture (2 hours) at Takasago Research & Development Center, Mitsubishi Heavy Industries, Japan, 18 July, 1997. |
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Keynote Lecture at the 5th bi-annual ASME/ISHMT International Conference on Heat and Mass Transfer (American Society of Mechanical Engg & Indian Society for Heat and Mass Transfer) 3-5 January, 2002. |
Presented numerous lectures /seminars at various places in the world. |