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publications
in refereed journals
Ayirala,
S.C., and Rao, D.N., “Author's response to
the comments on "A new mechanistic Parachor model to predict
dynamic interfacial tension and miscibility in
multicomponent hydrocarbon systems" by F.M. Orr and K.Jessen"
Journal of Colloids and Interface Science, 2006.
Ayirala,
S.C., and Rao, D.N., “Enhancement of Oil Recovery by
Surfactant-Induced Wettability Alteration"
Saudi Aramco Journal of Technology,
Spring 2006, pp. 37-44.
Xu, W.,
Ayirala,
S.C., and Rao, D.N.,
"Wettability Alterations
Due to Crude Oil Composition and an Anionic Surfactant in
Petroleum Reservoirs",
Journal of Adhesion Science and Technology, Vol. 20,
No.7, pp. 693-704, 2006.
Ayirala,
S.C., and Rao, D.N.,
"The Multiple Roles of
Interfacial Tension in Fluid Phase Equilibrium and
Fluid-Solid Interactions",
Journal of Adhesion Science and Technology, Vol. 20,
No.2-3, pp. 125-142, 2006.
Ayirala,
S.C.,
Vijapurapu, C. S., and
Rao, D.N., “Beneficial Effects of
Wettability Altering Surfactants in Oil-Wet Fractured
Reservoirs",
Journal of Petroleum Science and Engineering, Vol.
52, pp. 261-274, March 2006.
Ayirala,
S.C., and Rao, D.N., “A New Mechanistic
Parachor Model to Predict Dynamic Interfacial Tension and
Miscibility in Multicomponent Hydrocarbon Systems”,
Journal of Colloids and Interface Science, Vol. 299,
pp. 321-331, 2006.
Xu, W.,
Ayirala,
S.C., and
Rao,
D.N., "Compositional
Dependence of Wetting and Contact Angles in
Solid-Liquid-Liquid Systems Under Realistic Environments",
The Canadian Journal of Chemical Engineering, 84,
February 2006, pp. 44-51.
Xu, W.,
Ayirala,
S.C., and
Rao,
D.N., "Interfacial Behavior of
Complex Hydrocarbon Fluids at Elevated Pressures and
Temperatures",
The Canadian Journal of Chemical Engineering, 84,
February 2006, pp. 22-32.
Madhav, M.M., and Rao, D.N., “Experimental
Investigation of Miscible and Immiscible
Water-Alternating-Gas (WAG) Process Performance",
Journal of Petroleum Science and Engineering, 2005.
Ayirala,
S.C., and Rao, D.N., "Application of the Parachor Model to
the Prediction of Miscibility in Multi-Component Hydrocarbon
Systems", J. Physics: Condensed Matter, 16, S2177-S2186,
2004.
Vijapurapu, C. S., and Rao, D. N., “Compositional Effects of
Fluids on Spreading, Adhesion and Wettability in Porous
Media”,
Colloids
and Surfaces A: Physicochemical and Engineering Aspects,
24, 335-342, 2004.
Ayirala,
S.C., and Rao, D.N., “Multiphase Flow and Wettability
Effects of Surfactants in Porous Media”, Colloids and
Surfaces A: Physicochemical and Engineering Aspects,
241, pp. 313-322, 2004.
Rao, D.N., “The Concept,
Characterization, Concerns and Consequences of Contact
Angles in Solid-Liquid-Liquid Systems”,
Invited Paper, reviewed and published in ‘Contact Angle,
Wettability and Adhesion’, Vol. 3 (Ed. K.L. Mittal), pp.
191-210, VSP International Science Publishers, 2003.
Vijapurapu, C.S., and Rao, D.N., “The Effect of Rock
Surface Characteristics on Reservoir Wettability”,
Paper reviewed, revised and published in ‘Contact Angle,
Wettability and Adhesion’, Vol. 3 (Ed. K.L. Mittal), VSP
International Science Publishers, pp. 407-426, 2003.
Muhammad, Z., and Rao, D.N., "Determination of
Dynamic Contact Angles in Solid-Liquid-Liquid Systems Using
the Wilhelmy Plate Technique,"
Journal
of Adhesion Science and Technology,
Vol. 17, No.9, pp. 1187-1206, 2003.
Rao, D.N., and Lee, J. I., “Determination of
Gas-Oil Miscibility Conditions by Interfacial Tension
Measurements”, Journal of
Colloids and Interface Science, Vol. 262, pp. 474-482,
2003.
Rao, D.N., and Lee, J.I., “Application of the New
Vanishing Interfacial Tension Technique to Evaluate
Miscibility Conditions for the Terra Nova Offshore Project",
Journal of Petroleum Science and Engineering, Vol.
35, Issues 3-4, pp. 247-262, August 2002.
Rao, D.N.
"Measurement of Dynamic Contact Angles in
Solid-Liquid-Liquid Systems at Elevated Pressures and
Temperatures", Colloids and Surfaces A: Physicochemical
and Engineering Aspects, Vol. 206, Nos. 1-3, pp.
203-216, July 2002.
Rao,
D.N., "Correlation of Oil-Water Flow Behaviour in Reservoir
Rocks with Dynamic Contact Angles", Journal of Canadian
Petroleum Technology, 41, 7, pp. 31-38, July 2002.
Rao, D.N.
and Girard, M.G., "Induced Multiphase Flow Behaviour Effects
in Gas Injection EOR Projects", Journal of Canadian
Petroleum Technology, 41, 7, PP. 53-60, July 2002.
Rao, D.N., and Karyampudi, R.S., "Application of the
Dual-Drop Dual-Crystal Contact Angle Technique to
Characterize Heavy Oil Reservoir Wettability",
Journal of Adhesion Science and Technology, Vol. 16,
No.5, pp. 579-596, May 2002.
Rao,
D.N., "Fluid-Fluid and Solid-Fluid Interfacial Interactions
in Petroleum Reservoirs", Petroleum Science and
Technology, Vol. 19, Issues 1-2, pp. 157-188, March
2001.
Rao, D.N., "Gas Injection EOR-
A New Meaning
in the
New Millennium"
Invited Article for the Distinguished Author Series,
Journal of Canadian Petroleum Technology, Vol. 40, No.2,
pp. 11-18, February 2001.
Rao, D.N., and Karyampudi, R.S., "Productivity Enhancing
Wettability Control Technology for Cyclic Steam Process in
the Elk Point Cummings Formation",
Journal of Canadian Petroleum Technology, Vol. 38,
No.13, p. 53, December 1999.
Rao, D.N., McIntyre, F.J., and Fong,
D.K., "Application of a New
Technique to Optimize Injection Gas Composition for the
Rainbow Keg River 'F' Pool Miscible Flood",
Journal of Canadian Petroleum Technology, Vol. 38,
No.13, p. 45, December 1999.
Rao, D.N., “Wettability Effects in
Thermal Recovery Operations”,
SPE Reservoir Evaluation and Engineering, 2 (5), pp.
420-430, October 1999.
Rao, D.N., "A New Technique of
Vanishing Interfacial Tension for Miscibility Determination",
Fluids Phase Equilibria, An International Journal,
139, pp. 311-324, 1997.
Rao, D.N. and Girard, M.G., "A New Technique for
Reservoir Wettability Characterization",
Journal of Canadian Petroleum Technology, pp. 31-39,
January 1996.
Rao, D.N., Girard, M. and Sayegh, S.G.,
"The Influence of
Reservoir Wettability on Waterflood and Miscible Flood
Performance",
Journal of Canadian Petroleum Technology, pp. 47-55,
June 1992.
Rao, D.N., Girard, M., and Sayegh,
S.G., "Impact of Miscible
Flooding on Wettability, Relative Permeability, and Oil
Recovery",
SPE Reservoir Engineering, pp. 204-212, May 1992.
Sayegh, S.G., Rao, D.N., Kokal, S.L.,
and Najman, J., "Phase Behavior and
Physical Properties of Lindbergh Heavy Oil/CO2
Mixtures",
Journal of Canadian Petroleum Technology, pp. 31-39,
November-December 1990.
Rao, D.N., Mohtadi, M.F., and Hastaoglu, M.A.,
"Direct Contact Heat Transfer - A Better Way to
High Efficiency and Compactness", The
Canadian Journal of Chemical Engineering,
62, June 1984, pp. 319-325.
Rao,
D.N., Bakshi, N.N., and Macdonald, D.G., "Colour Removal
from Pulp Mill Effluent Using Fly-Ash Acidified With
Chlorination Stage Effluent", Transactions of the
Technical Section, Canadian Pulp and Paper Association,
4 (3), pp. TR77-82, September 1978.
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PAPERS PRESENTED IN CONFERENCES AND/OR PUBLISHED IN
PROCEEDINGS
Kulkarni, M.M.,
and Rao, D.N., "Analytical
Modeling of the Forced Gravity Drainage GAGD Process"
, Paper prepared for presentation at the AIChE 2006 Annual
Meeting, San Franciso, CA, Nov 12 –17, 2006.
Ayirala, S.C. and Rao, D.N: "Dew Point Pressure
Prediction of Gas Condensate Reservoirs,” Paper
prepared for presentation at 6th
Petroleum International Conference and
Exhibition, Petrotech-2005, New Delhi, India,
January 16-19, 2005.
Ayirala,
S.C. and Rao, D.N.: “Solubility, Miscibility and
their Relation to Interfacial Tension for
Application in Reservoir Gas-Oil Systems,” SPE
Paper 91918 prepared for presentation at the
SPE International Petroleum Conference, Puebla,
Pue., Mexico, Nov. 7-9, 2004.
Rao, D.N.
and Ayirala, S.C.: “Application of a New
Mechanistic Parachor Model to Predict Dynamic
Gas-Oil Miscibility in Reservoir Crude Oil –
Solvent Systems,” SPE Paper 91920 prepared for
presentation at the SPE International Petroleum
Conference, Puebla, Pue., Mexico, Nov. 7-9,
2004.
Kulkarni,
M M, and Rao, D N, “Analysis of the Novel
Toe-To-Heel Air Injection (THAI) Process using
Analytical Models”, Paper prepared for
presentation at the AIChE 2004 Annual Meeting,
Austin, TX, Nov 7 –12, 2004,
Kulkarni,
M M, and Rao, D N, “Is Gravity Drainage an
Effective Alternative to WAG?”, Paper prepared
for presentation at the AIChE 2004 Annual
Meeting, Austin, TX, Nov 7 –12, 2004.
Kulkarni,
M M, and Rao, D N, “Experimental Investigation
of Various Methods of Tertiary Gas Injection,
SPE 90589, Paper prepared for presentation at
the 80th Society of Petroleum
Engineers’ Annual Technical Conference and
Exhibition, Houston, TX, Sept 26 – 29, 2004.
Kulkarni,
M M, and Rao, D N, “Analytical Prediction of
In-Situ Combustion (ISC) Process Performance –
Applicability to Indian EOR Scene”, Paper
prepared for presentation at the 11th
Annual India Oil and Gas Review Symposium and
International Exhibition, Mumbai, India, Sept 6
– 7, 2004.
Kulkarni,
M M, and Rao, D N, “Is there a ‘Happy-Medium’
between Single Slug and Water-Alternating-Gas
(WAG) Processes?” Paper prepared for
presentation at the 11th Annual India
Oil and Gas Review Symposium and International
Exhibition, Mumbai, India, Sept 6 – 7, 2004.
Ayirala,
S.C. and Rao, D.N.: “Surfactant-Induced
Modifications in Interfacial and Surface Forces
and Multiphase Flow Dynamics in Porous Media,”
Paper presented at Fourth International
Symposium on Contact Angle, Wettability and
Adhesion, Philadelphia, PA, June 14-16, 2004.
Rao, D.N.
and Ayirala, S.C.: “The Multiple Roles of
Interfacial Tension in Fluid Phase Equilibria
and Fluid-Solid Interactions,” Invited paper
presented at Fourth International Symposium on
Contact Angle, Wettability and Adhesion,
Philadelphia, PA, June 14-16, 2004.
Ayirala,
S.C., Vijapurapu, C.S. and Rao, D.N.:
“Beneficial Effects of Wettability Altering
Surfactants in Oil-Wet Fractured Reservoirs,”
Paper presented at the 8th
International Symposium on Reservoir
Wettability, Houston, TX, May 16-18, 2004.
Rao,
D.N., “Does the Zisman-type Spreading Behavior
Exist in Reservoir Rock-Fluids Systems?”,
Poster presentation at the 8th
International Symposium on Reservoir
Wettability, Houston, TX, May 16-18, 2004.
Rao,
D.N. and Ayirala, S.C.: “Measurement and
Modeling of Gas-Oil Interfacial Tension at
Reservoir Conditions,” Paper presented at the
2004 ATW-Gas Condensate Reservoir Development
and Management, Houston, TX, May 19-20, 2004.
Rao,
D.N., Ayirala, S.C., Kulkarni, M.M. and Sharma,
A.P.: “Development of Gas Assisted Gravity
Drainage (GAGD) Process for Improved Light Oil
Recovery,” SPE Paper 89357 presented at the
SPE/DOE 14th Symposium on Improved
Oil Recovery, Tulsa, OK, April 17-21, 2004.
Ayirala,
S.C. and Rao, D.N.: “Modified Parachor Model for
Prediction of Interfacial Tension in
Multi-Component Hydrocarbon Systems,” Paper
presented at the 227th National ACS
Meeting, Anaheim, CA, March 28-April 1, 2004.
Ayirala, S.C., Rao, D.N., and Casteel, J.,
“Comparison of Minimum Miscibility Pressures
Determined from Gas-Oil Interfacial Tension
Measurements with Equation of State
Calculations”, Paper SPE 84187 prepared for
presentation at SPE Annual Conference and
Exhibition, Denver, CO. October 5-8, 2003.
Ayirala, S.C., Rao, D.N., and Casteel, J.C.,
“Validation of New Experimental Approach of
Vanishing Interfacial Tension (VIT) for Minimum
Miscibility Pressure (MMP) Determination using
Equations of State”, Paper presented at
Astatphys–Mex-2003 Petroleomics Symposium”,
Puerto Vallarta, Mexico, August 25-29, 2003.
Vijapurapu, C. S., and Rao, D. N.,
“Compositional Effects of Fluids on Spreading,
Adhesion and Wettability in Porous Media”, Paper
presented at TRI/Princeton’s Third International
Workshop on Characterization of Porous
Materials, Princeton, N.J., June 23-25, 2003.
Ayirala, S.C., and Rao, D.N., “Multiphase Flow
and Wettability Effects of Surfactants in Porous
Media”, Paper presented at TRI/Princeton’s Third
International Workshop on Characterization of
Porous Materials, Princeton, N.J., June 23-25,
2003.
Vijapurapu, C. S., and Rao, D. N., “Effect of
Brine Dilution and Surfactant Concentration on
Spreading and Wettability”, Paper SPE-80273,
Proceedings of the 2003 SPE International
Symposium on Oilfield Chemistry, Houston, TX,
February 5-7, 2003.
Rao, D. N., “Recent Developments in Techniques
to Characterize Reservoir Rock-Fluids
Interactions”, Paper No. U448, Proceedings of
the 5th International Petroleum Conference and
Exhibition, Petrotech-2003, New Delhi, India,
January 9-12, 2003.
Rao, D. N., “Problems, Promises and Design
Considerations of Gas Injection Enhanced Oil
Recovery Processes”, Paper No. U449, Proceedings
of the 5th International Petroleum Conference
and Exhibition, Petrotech-2003, New Delhi,
India, January 9-12, 2003.
Ayirala, S. C., Rao, D. N., “Enhancement of Oil
Recovery Through Surfactant-Induced Relative
Permeability Modifications”, Paper No. U450,
Proceedings of the 5th International Petroleum
Conference and Exhibition, Petrotech-2003, New
Delhi, India, January 9-12, 2003.
Vijapurapu, C. S., Rao, D. N., “The Dependence
of Reservoir Wettability on Rock and Fluids
Characterization”, Paper No. U451, Proceedings
of the 5th International Petroleum Conference
and Exhibition, Petrotech-2003, New Delhi,
India, January 9-12, 2003.
Rao, D.N., “The Concept, Characterization,
Concerns and Consequences of Contact Angles in
Solid-Liquid-Liquid Systems”, Invited paper
presented at the Third International Symposium
on Contact Angle, Wettability and Adhesion,
Providence, Rhode Island, May 20-23, 2002.
Rao, D.N., and Vijapurapu, C.S., ""The Effect of
Rock Surface Characteristics on Reservoir
Wettability", Paper presented at the Third
International Symposium on Contact Angle,
Wettability and Adhesion, Providence, Rhode
Island, May 20-23, 2002.
Vijapurapu, C.S., Rao, D.N., and Lian, K., "The
Effect of Rock Surface Characteristics on
Reservoir Wettability", Paper SPE 75211
presented at the SPE/DOE 13th Symposium on
Improved Oil Recovery, Tulsa, OK, April 13-17,
2002.
Rao, D.N., and Radwani, H.H., "The Effect of
Solid Surface Roughness on Dynamic Contact
Angles in Solid-Liquid-Liquid Systems", Paper
ETCE-2002/CMDA-29071 presented at the ASME
Engineering Technology Conference on Energy,
Houston, TX, February 4-6, 2002.
Rao, D.N., "Measurements of Dynamic Contact
Angles in Solid-Liquid-Liquid Systems at
Elevated Pressures and Temperatures", Paper
presented at the First International
TRI/Princeton Workshop on Nanocapillarity:
Wetting of Heterogeneous Surfaces and Porous
Solids, Princeton, NJ, June 25-27, 2001.
Rao, D.N., and Girard, M.G., "Induced Multiphase
Flow Behavior Effects in Gas Injection EOR
Projects", Paper prepared for presentation at
the Canadian International Petroleum
Conference", June 12-15, 2001.
Muhammad, Z., and Rao, D.N., "Compositional
Dependence of Reservoir Wettability", SPE 65409,
paper presented at the SPE International
Symposium on Oil Field Chemistry, Houson, TX,
February 13-16, 2001.
Rao, D.N., and Bassiouni, Z.A., "Cost-Effective
CO2 Sequestration through Enhanced
Oil Recovery", Paper ETCE 2001-17091, paper
presented at ASME's Engineering Technology
Conference on Energy, Houston, TX, February 5-7,
2001.
Rao, D.N., and Lee, L.I., “Miscibility
Evaluation for Terra Nova Offshore Field”, Paper
presented at the Canadian International
Petroleum Conference, June 5-8, 2000, Calgary,
Alberta, Canada.
Rao, D.N., and
Lee, L.I., “Evaluation of Minimum Miscibility
Pressure and Composition for Terra Nova Offshore
Project Using the New Vanishing Interfacial
Tension Technique”, SPE paper 59338 presented at
SPE/DOE Improved Oil Recovery Symposium, Tulsa,
Ok, April 3-5, 2000.
Rao, D.N., and Bassiouni, Z.A., “A New Technique
to Confidently Characterize Wettability
Alterations by Drilling/Completions/Workover
Fluids”, SPE paper 59516 presented at the SPE
International Symposium on Formation Damage
Control, Lafayette, LA, February 23-24, 2000.
Rao, D.N., “Rapid and Cost-effective
Determination of Gas-Oil Miscibility using the
Vanishing Interfacial Tension Technique, paper
presented at the 3rd International
Symposium on Colloid Chemistry in Oil
Production, Huatulco, Mexico, November 14-17,
1999.
Rao, D.N., “Characterization of Spreading and
Adhesion Phenomena in Crude Oil-Brine-Rock
Systems at Reservoir Conditions”, Paper
presented at the 3rd International
Symposium on Colloid Chemistry in Oil
Production, Huatulco, Mexico, November 14-17,
1999.
Rao, D.N., "Is there a Correlation between
Wettability from Corefloods and Contact
Angles?,” SPE Paper 37234, presented at the 1997
SPE International Symposium on Oil Field
Chemistry, Houston, Texas, 18-21 February 1997.
Rao, D.N., McIntyre, F.J., and Fong, D.K.,
"Application of a New Technique to Optimize
Injection Gas Composition for the Rainbow 'F'
Pool Miscible Flood", CIM paper 96-100 presented
at the Petroleum Society's 47th Annual Technical
Meeting, Calgary, 10-12 June 1996.
Rao, D.N., "Wettability Effects in Thermal Heavy
Oil Recovery Operations", SPE paper 35462
presented at the 1996 SPE/DOE Tenth Symposium on
Improved Oil Recovery, Tulsa, OK, 21-24 April
1996.
Shaw, J.C., Tsuen, R., Leggit, S.M., Schramm,
L.L., and Rao, D.N., "Pyrobitumen Induced
Formation Damage Problems", SPE paper 31130
presented at the International Symposium on
Formation Damage Control, Lafayette, LA, 14-15
February 1996.
Rao,
D.N., "The New Dual-Drop-Dual-Crystal Contact
Angle Technique for Confident Reservoir
Wettability Characterization", Paper #4,
presented at the 16th International Energy
Agency Workshop/Symposium, October 15-18, 1995,
Chiba City, Japan.
Rao, D.N., "Discovery, Development and Field
Test of Wettability Control Technology", Paper
#10 presented at the 16th International Energy
Agency Workshop/Symposium, October 15-18, 1995,
Chiba City, Japan.
Rao, D.N., "Formation Wettability Evaluation
using a New Contact Angle Technique", Paper
presented at the CSPG/CWLS Joint Symposium,
Calgary, Alberta, May 28-31, 1995.
Rao, D.N., and Karyampudi, R.S., "Productivity
Enhancing Wettability Control Technology for
Cyclic Steam Process in the Elk Point Cummings
Formation", Paper 95-62 presented at the 46th
Annual Technical Conference of CIM, May 14-17,
1995, Banff, Alberta. (Also presented at PRI's
Annual Conference & Exhibit in Calgary, May 25,
1995).
Karyampudi, R.S., and Rao, D.N., "Improved
Wettability Determination Using DDDC Technique
at Elk Point Heavy Oil Field", Paper 95-22
presented at the 46th Annual Technical
Conference of CIM, May 14-17, 1995, Banff,
Alberta.
Rao, D.N., and Girard, M. G., "Characterization
of Dynamic Fluid-Solid Interactions in Petroleum
Reservoirs", paper presented at the 44th
Canadian Chemical Engineering Conference,
Calgary, Alberta, October 2-5, 1994.
Rao, D.N., "A Simple New Technique to Account
for Adhesion in Wettability Characterization
Through Contact Angles", paper presented at the
3rd International Symposium on Evaluation of
Reservoir Wettability and its Effect on Oil
Recovery, Laramie, Wyoming, U.S.A, September
21-23, 1994.
Rao, D.N., and Girard, M. G., "A New Technique
for Reservoir Wettability Characterization", CIM/AOSTRA
Paper 94-48 presented at the 45th Annual
Technical Conference of CIM, June 12-15, 1994,
Calgary, Alberta.
Rao, D.N., and Maini, B.B., "Impact of Oil-Rock
Adhesion on Reservoir Mechanics", CIM Paper
93-65 presented at the 44th Annual Technical
Conference, May 10-12, 1993, Calgary, Alberta.
Sayegh, S.G., Fisher, D.B., and Rao, D.N., “A
Parametric Study of Hydrocarbon Miscible EOR in
Visual Micromodels”, paper presented at the 42nd
Canadian Chemical Engineering Conference,
Toronto, Ontario, October 18-21, 1992.
Rao, D.N., Girard, M., and Sayegh, S.G., "The
Influence of Reservoir Wettability on Waterflood
and Miscible Flood Performance", Paper No. CIM/AOSTRA
91-06, presented at the CIM/AOSTRA 1991
Technical Conference, Banff, Alberta, 21-24
April 1991.
Rao, D.N., Girard, M., and Sayegh, S.G., "Impact
of Miscible Flooding on Wettability, Relative
Permeability and Oil Recovery", Paper No. SPE
20522, presented at the 65th SPE Annual
Technical Conference and Exhibition, New
Orleans, Louisiana, 23-26 September 1990.
Rao, D.N., Girard, M., and Sayegh, S.G.,
"Interfacial Phenomena in Miscible Gas
Processes", Paper No. SPE 19698, presented at
the 64th SPE Annual Technical Conference and
Exhibition, San Antonio, TX, 8-11 October 1989.
Sayegh, S.G., Rao, D.N., Kokal, S.L., and Najman,
J., "Phase Behavior and Physical Properties of
Lindbergh Heavy Oil/CO2 Mixtures",
Paper No. 89-40-45, presented at the 40th Annual
Technical Meeting of the Petroleum Society of
CIM, Banff, Alberta, 28-31 May 1989.
Rao, D.N., Mohtadi, M.F., and Hastaoglu, M.A.,
"Direct Contact Heat Transfer - A Better Way to
High Efficiency and Compactness", Paper
presented at the 33rd Conference of the Canadian
Society of Chemical Engineers, Toronto, Ontario,
Canada, 2-5 October 1983.
Rao, D.N., and Mohtadi, M.F., "A Novel Direct
Contact Heat Exchange System for Efficient
Heating of Water", Paper presented at the
ASME-JSME Thermal Engineering Conference,
Honolulu, Hawaii, 20-24 March 1983.
Rao, D.N. and Mohtadi, M.F., "Performance
Characteristics of a Novel Direct Contact Heat
Transfer System", Paper presented at the 66th
Conference of the Chemical Institute of Canada,
Calgary, Alberta, Canada, 5-8 June 1983.
Wierzba, I., Rao, D.N., and Mohtadi, M.F., "A
Novel Technique for Steam Generation in Oil
Wells", Paper presented at the VI International
Symposium on Combustion Processes, Karpacz,
Poland, 26-30 August 1979.
Wierzba, I., Rao, D.N., and Mohtadi, M.F., "A
Novel In-Situ Steam Generator", Paper presented
at the Combustion Institute's Technical Meeting,
Kingston, Ontario, Canada, 3-4 May 1979.
Bakshi, N.N., Rao, D.N., and Macdonald, D.G., "Color
Removal from Pulp Mill Effluent Using Fly-Ash",
Paper presented at the 27th Conference of the
Canadian Society of Chemical Engineers, Calgary,
Alberta, Canada, 25 October 1977.
Macdonald, D.G., Bakshi, N.N., and Rao D.N., "Color
Removal from Pulp-Mill Effluent Using Acidified
Fly-Ash", Paper presented at the Fall Conference
of the Canadian Pulp and Paper Association,
Prince Albert, Saskatchewan, Canada, 22-24
September 1977.
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