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Research - Publications by Area:

 

Hydrodynamics of Thin Liquid Films

 

2017

1. Factors Affecting the Stability of Water-oil-water Emulsion Films. N. Politova, S. Tcholakova, N. D. Denkov. Colloids Surf. A, 522 (2017) 608–620; doi: 10.1016/j.colsurfa.2017.03.055

2. New Surfactant Mixtures for Fine Foams with Slowed Drainage. K. G. Marinova, K. T. Naydenova, E. S. Basheva, F. Bauer, J. Tropsch, J. Franke. Colloids Surf. A, 523 (2017) 54–61; doi: 10.1016/j.colsurfa.2017.03.050

3. Coalescence Stability of Water-in-Oil drops: Effects of Drop Size and Surfactant Concentration. N. Politova, S. Tcholakova, S. Tsibranska, N. D. Denkov, K. Muelheims. Colloids Surf. A 531 (2017) 32–39; doi: 10.1016/j.colsurfa.2017.07.085

 

2016

1. Kinetics of Drop Breakage and Drop-Drop Coalescence in Turbulent Flow. S. Tcholakova, N. Politova, N. Denkov. Biomath Communications 3 (2016) 1–163.

2. Factors Affecting the Coalescence Stability of Microbubbles. N. Pagureva, S. Tcholakova, K. Rusanova, N. Denkov, T. Dimitrova. Colloids Surf. A 508 (2016) 21–26.

3. Capillary Bridge: Transition from Equilibrium to Hydrodynamic State. B. Radoev, I.T. Ivanov, P. Petkov. Colloids Surf. A 505 (2016) 98–105; doi: 10.1016/j.colsurfa.2016.01.040

 

2015

1. Chemical Physics of Colloid Systems and Interfaces. P.A. Kralchevsky, K.D. Danov, in Handbook of Surface and Colloid Chemistry, Fourth Updated Edition; K. S. Birdi, Ed.; CRC Press, Boca Raton, 2015; Chapter 4, p. 247.

 

2014

1. Nanoemulsions Obtained via Bubble-Bursting at a Compound Interface. J. Feng, M. Roche, D. Vigolo, L.N. Arnaudov, S.D. Stoyanov, T.D. Gurkov, G.G. Tsutsumanova, H.A. Stone. Nature Physics 10 (2014) DOI: 10.1038/nphys3003.

 

2012

1. Role of Surfactants on the Approaching Velocity of Two Small Emulsion Drops. K.D. Danov, S.D. Stoyanov, N.K. Vitanov, I.B. Ivanov, J. Colloid Interface Sci. 368 (2012) 342-355.

2. Effect of Cationic Polymers on Foam Rheological Properties. N. Politova , S. Tcholakova , K. Golemanov, N.D. Denkov, M. Vethamuthu, K.P. Ananthapadmanabhan, Langmuir 28 (2012) 1115-1126.

3. Foam Rheology. N. D. Denkov, S. Tcholakova, R. Hoehler, S. Cohen-Addad, Chapter 6 in Foam Engineering: Fundamentals and Applications (1st Edition; P. Stevenson, Ed.), John Wiley & Sons, Chichester, UK, 2012.

4. Capillary Bridges. Radoev, B.; Petkov, P., Bulg. J. Chem. 1 (2012) 133-142.

 

2011

1. Collection of Papers from the 8th EUFOAM Conference and the Meetings of COST Actions D43 and P21, Borovets, Bulgaria, 13-16 July 2010. N.D. Denkov, P.A. Kralchevsky, Colloids and Surfaces A, 382 (2011) 1-2.

2. Statistics of Rupture in Relation to the Stability of Thin Liquid Films with Different Size. T.D. Gurkov, J.K. Angarska, K.D. Tachev, W. Gaschler, Colloids and Surfaces A, 382 (2011) 174-180.

 

2010

1. Emulsification and Emulsion Stability of Silica-charged Silicone Oils. S. Tcholakova, N. D. Denkov, D. Hristova, M. Deruelle, In The Proceedings of 5th World Congress on Emulsions, Lyon, France, 2010; Paper No. 4.1-50.

2. Viscous Ffriction in Sheared Concentrated Emulsions and Foams. N. D. Denkov, S. Tcholakova, K. Golemanov, A. Lips, In The Proceedings of 5th World Congress on Emulsions, Lyon, France, 2010; Paper No. 1.3-69.

 

2009

1. Effect of Disjoining Pressure on the Drainage and Relaxation Dynamics of Liquid Films with Mobile Interfaces. S. S. Tabakova, K. D. Danov, J. Colloid Interface Sci. 336 (2009) 273-284.

2. Jamming in Sheared Foams and Emulsions, Explained by Critical Instability of the Films between Neighboring Bubbles and Drops. N. D. Denkov, S. Tcholakova, K. Golemanov, A. Lips, Phys. Rev. Lett. 103 (2009) 118302.

 

2008

1. Reply to Comment on "Hydrophobic Forces in the Foam Films Stabilized by Sodium Dodecyl Sulfate: Effect of Electrolyte" and Subsequent Criticism. P. A. Kralchevsky, K. D. Danov, and J. K. Angarska, Langmuir 24 (2008) 2953-2953.

2. Viscous Friction in Foams and Concentrated Emulsions under Steady Shear. N. D. Denkov, S. Tcholakova, K. Golemanov, K. P. Ananthapadmanabhan, and A. Lips, Phys. Rev. Lett. 100 (2008) 138301.

3. Theoretical Model of Viscous Friction inside Steadily Sheared Foams and Concentrated Emulsions. S. Tcholakova, N.D. Denkov, K. Golemanov, K.P. Ananthapadmanabhan, A. Lips, Phys. Rev. E 78 (2008) 011405.

4. Chemical Physics of Colloid Systems and Interfaces. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 7 in Handbook of Surface and Colloid Chemistry (3rd Updated Edition; K. S. Birdi, Ed.). CRC Press, Boca Raton, FL, 2008.

 

2007

1. Effect of Electric-Field-Induced Capillary Attraction on the Motion of Particles at an Oil–Water Interface, M. P. Boneva, N. C. Christov, K. D. Danov, and P. A. Kralchevsky, Physical Chemistry Chemical Physics 9(48) (2007) 6371-6384.

 

2006

1. Ivan B. Ivanov: Remarkable Figure in Colloid Science. P. A. Kralchevsky, and N. D. Denkov, Colloids Surf. A, 282-283 (2006) 1-7.

2. Foam-Wall Friction: Effect of Air Volume Fraction for Tangentially Immobile Bubble Surface. N. D. Denkov, S. Tcholakova, K. Golemanov, V. Subramanian, and A. Lips, Colloids Surf. A, 282-283 (2006) 329-347.

 

2004

1. Detection of the Hydrophobic Surface Force in Foam Films by Measurements of the Critical Thickness of Film Rupture. J. K. Angarska, B. S. Dimitrova, K. D. Danov, P. A. Kralchevsky, K. P. Ananthapadmanabhan, A. Lips, Langmuir 20 (2004) 1799-1806.

2. Effect of Surfactants on Drop Stability and Thin Film Drainage. K. D. Danov, In: Fluid Mechanics of Surfactant and Polymer Solutions (CISM Cources and Lectures No. 463). V.M. Starov and I.B. Ivanov, Eds., Springer, New York, 2004; pp. 1-38.

 

2003

1. Hydrodynamic Instability and Coalescence in Trains of Emulsion Drops or Gas Bubbles Moving through a Narrow Capillary. K.D. Danov, D.S. Valkovska, P.A. Kralchevsky, J. Colloid Interface Sci. 267 (2003) 243-258.

 

2002

1. Stability of Draining Plane-Parallel Films Containing Surfactants. D.S. Valkovska, K. D. Danov, and I. B. Ivanov, Adv. Colloid Interface Sci. 96 (2002) 101-129.

2. Hydrodynamic Behavior and Stability of Approaching Deformable Drops. T. D. Gurkov, E. S. Basheva, In: "Encyclopedia of Surface & Colloid Science", A. T. Hubbard (Ed.), Marcel Dekker, New York, 2002.

3. Chemical Physics of Colloid Systems and Interfaces: 5. Hydrodynamic Interactions in Dispersions; 6. Kinetics of Coagulation. P. A. Kralchevsky, K. D. Danov and N. D. Denkov, Chapter 5 in "Handbook of Surface and Colloid Chemistry", Second Edition (K. S. Birdi, Ed.), CRC Press, New York, 2002.

 

2001

7. Influence of Ionic Surfactants on the Drainage Velocity of Thin Liquid Films. D. S. Valkovska, K. D. Danov, J. Colloid Interface Sci. 241 (2001) 400-412.

14. Dynamic Processes in Surfactant Stabilized Emulsions. K.D. Danov, P.A. Kralchevsky, and I.B. Ivanov, Chapter 26 in "Encyclopedic Handbook of Emulsion Technology", J. Sjoblom, Ed., Marcel Dekker, New York, 2001; pp. 621-659.

16. Role of Surface Diffusion for the Drainage and Hydrodynamic Stability of Thin Liquid Films. S. D. Stoyanov, N. D. Denkov, Langmuir 17 (2001) 1150-1156.

35. Particles at Interfaces: Deformations and Hydrodynamic Interactions. P. A. Kralchevsky and K. Nagayama, Chapter 6 in the book: "Particles at Fluid Interfaces and Membranes" (P. A. Kralchevsky and K. Nagayama, Authors), Elsevier, Amsterdam, 2001; pp. 248-286.

 

2000

1. The Effect of Oil Solubility on the Oil Drop Entry at Water-Air Interface. D.S. Valkovska, P.A. Kralchevsky, K.D. Danov, G. Broze, and A. Mehreteab, Langmuir 16 (2000) 8892-8902.

2. Determination of Bulk and Surface Diffusion Coefficients from Experimental Data for Thin Liquid Film Drainage. D. S. Valkovska, K. D. Danov, J. Colloid Interface Sci. 223 (2000) 314-316.

3. Drag of a Solid Particle Trapped in a Thin Film, or at an Interface: Influence of Surface Viscosity and Elasticity. R. Dimova, K. D. Danov, B. Pouligny, and I. B. Ivanov, J. Colloid Interface Sci. 226 (2000) 35-43.

4. Effect of Surfactants on the Stability of Films between Two Colliding Small Bubbles. D.S. Valkovska, K. D. Danov, I.B. Ivanov, Colloids Surf. A 175 (2000) 179-192.

5. Investigation of Thin Aqueous Films on Silica Using a Modified Interferometric Technique. P. Somasundaran, S. Simpson, R.K. Jain, I.B. Ivanov, V. Raghuraman, J. Colloid Interface Sci. 225 (2000) 243-246.

6. Hydrodynamic Theory and Experiments for the Motion of the Front between the Thick and Thin Regions in a Foam Films. S. D. Stoyanov, V. N. Paunov, E. S. Basheva, I. B. Ivanov, Proc. 3rd Euroconference on Foams, Emulsions and their Applications (Eurofoam 2000), 4-8 June, 2000, p. 24.

 

1999

1. Flocculation and Coalescence of Micron-Size Emulsion Droplets. I. B. Ivanov, K. D. Danov and P. A. Kralchevsky, Colloids and Surfaces A 152 (1999) 161-182.

2. Surfactants Role on the Deformation of Colliding Small Bubbles. D. S. Valkovska, K. D. Danov, I. B. Ivanov, Colloids & Surfaces A 156 (1999) 547-566.

3. Effect of Surfactants on the Film Drainage. K. D. Danov, D. S. Valkovska and I. B. Ivanov, J. Colloid Interface Sci. 211 (1999) 291-303.

4. Thinning and Rupture of Aqueous Surfactant Films on Silica. P. Somasundaran, S. Simpson, I. Ivanov, R.K. Jain, D. Sarkar, Langmuir 15 (1999) 7658-7661.

5. Size Dependence of the Stability of Emulsion Drops Pressed Against a Large Interface. E. S. Basheva, T. D. Gurkov, I. B. Ivanov, G. Bantchev, B. Campbell and R. Borwankar, Langmuir 15 (1999) 6764-6769.

6. Part 2 of the review "Equilibrium and Dynamics of Surfactant Adsorption Monolayers and Thin Liquid Films". K.D. Danov, P.A. Kralchevsky and I.B. Ivanov, in: Handbook of Detergents, Part A: Properties, G. Broze, Ed., Chapter 9. M. Dekker, New York, 1999; pp. 303-418.

7. A Novel Fast Experimental Technique for Measuring Dynamic Surface and Interfacial Effect of Ionic Surfactants on the Film Drainage. D.S. Valkovska and K.D. Danov, in the Proceedings of the 15th Brazilian Congress of Mechanical Engineering, COBEM'99, paper AAEEJA, Sao Paulo, 1999.

8. Effect of Ionic Surfactants on the stability of plane-parallel films. D.S. Valkovska and K.D. Danov, in the Proceedings of the 15th Brazilian Congress of Mechanical Engineering, COBEM'99, paper AAEEJC, Sao Paulo, 1999.

 

1998

1. Stability of Evaporating Two-Layered Liquid Film in the Presence of Surfactant: I. The Equations of Lubrication Approximation. K. D. Danov, V. N. Paunov, N. Alleborn, H. Raszillier and F. Durst, Chem. Eng. Sci. 53 (1998) 2809-2822.

2. Stability of Evaporating Two-Layered Liquid Film in the Presence of Surfactant: II. Linear Analysis. K. D. Danov, V. N. Paunov, S. D. Stoyanov, N. Alleborn, H. Raszillier and F. Durst, Chem. Eng. Sci. 53 (1998) 2823-2837.

3. Stability of Evaporating Two-Layered Liquid Film in the Presence of Surfactant: III. Non-Linear Stability Analysis. V. N. Paunov, K. D. Danov, N. Alleborn, H. Raszillier, and F. Durst, Chem. Eng. Sci. 53 (1998) 2839-2857.

4. Role of Surface Forces in the Stability of Evaporating Thin Liquid Films That Contain Surfactant Micelles. T. D. Gurkov, K. D. Danov, N. Alleborn, H. Raszillier and F. Durst, J. Colloid Interface Sci. 198 (1998) 224-240.

5. The Stability of Evaporating Thin Liquid Films in the Presence of Surfactant: I. Lubrication Approximation and Linear Analysis. K. D. Danov, N. Alleborn, H. Raszillier and F. Durst, Phys. Fluids 10(1) (1998) 131-143.

6. Direct Observation of the Dynamics of Latex Particles Confined inside Thinning Water-Air Films. K. P. Velikov, F. Durst, O. D. Velev, Langmuir 14 (1998) 1148-1155.

7. Gradual Disintegration of Protein Lumps Contained in Thin Emulsion Films: Role of the Surface Diffusion. T.D. Gurkov, K.G. Marinova, A. Zdravkov, C. Oleksiak and B. Campbell, Progress in Colloid & Polymer Sci. 110 (1998) 263-268.

 

1997

1. Stability of Emulsions under Equilibrium and Dynamic Conditions. I. B. Ivanov and P. A. Kralchevsky, Colloids & Surfaces A 128 (1997) 155-175.

2. Hydrodynamic Theory for Spontaneously Growing Dimple in Emulsion Films with Mass Transfer. K. D. Danov, T. D. Gurkov, T. Dimitrova, I. B. Ivanov and D. Smith, J. Colloid Interface Sci. 188 (1997) 313-324.

3. The Role of Additives for the Behaviour of Thin Emulsion Films Stabilized by Proteins. K. G. Marinova, T. D. Gurkov, O. D. Velev, I. B. Ivanov, B. Campbell and R. P. Borwankar, Colloids and Surfaces A 123-124 (1997) 155-167.

4. Motion of the Front between Thick and Thin Film: Hydrodynamic Theory and Experiment with Vertical Foam Films. S. D. Stoyanov, V. N. Paunov, E. S. Basheva, I. B. Ivanov, A. Mehreteab and G. Broze, Langmuir 13 (1997) 1400-1407.

5. Critical Film Thickness and Coalescence in Emulsions. K. D. Danov, I. B. Ivanov, In: Proceedings of the 2nd World Congress on Emulsions, Paper 2-3-154 (1997).

6. Stability of Liquid Films in Non-preequilibrated Emulsions. T. D. Gurkov, K. D. Danov, O. D. Velev, I. B. Ivanov, R. P. Borwankar, In: Proceedings of the 2nd World Congress on Emulsions, Paper 2-3-155 (1997).

7. Motion of a Massive Microsphere Bound to a Spherical Vesicle. K.P. Velikov, C. Dietrich, A. Hadjiisky, K. Danov, B. Pouligny, Europhys. Let. 40 (1997) 405-410.

8. Effect of the Surfactant Concentration on the Kinetic Stability of Thin Foam and Emulsion Films. K. P. Velikov, O. D. Velev, K. G. Marinova, G. N. Constantinides, J. Chem. Soc., Faraday Trans. 93 (1997) 2069-2075.

 

1995

1. Influence of the Surface Viscosity on the Drag and Torque Coefficients of a Solid Particle in a Thin Liquid Layer. K. D. Danov, R. Aust, F. Durst and U. Lange, Chemical Engineering Science 50 (1995) 263-277.

2. On the Slow Motion of an Interfacial Viscous Droplet in a Thin Liquid Layer. K. D. Danov, R. Aust, F. Durst and U. Lange, Chemical Engineering Science 50 (1995) 2943-2956.

3. Abnormal Thickness and Stability of Nonequilibrium Liquid Films. O. D. Velev, T. D. Gurkov, I. B. Ivanov and R. P. Borwankar, Phys. Rev. Letters 75 (1995) 264-267.

4. Investigations of Thin Liquid Films of Small Diameters and High Capillary Pressures by a Miniaturized Cell. O. D. Velev, G. N. Constantinides, D. G. Avraam, A. C. Payatakes, R. P. Borwankar, J. Colloid Interface Sci. 175 (1995) 68-76.

5. Thin Liquid Film Physics. P.A. Kralchevsky, K.D. Danov and I.B. Ivanov, in: "Foams: Theory, Measurements and Applications", R.K. Prud'homme, Editor; M. Dekker, New York, 1995; pp. 1-97.

 

1993

1. Spontaneous Cyclic Dimpling in Emulsion Films Due to Mass Transfer between the Phases. O. D. Velev, T. D. Gurkov and R. P. Borwankar, J. Colloid Interface Sci. 159 (1993) 497-501.

2. Bancroft Rule and Hydrodynamic Stability of Thin Films and Emulsions. K. Danov, O. Velev, I. Ivanov, R. Borwankar, Proc. First World Congress in Emulsion, Paris, 1993.

3. Stability of Films and Emulsions in the Presence of Nonionic Surfactant Blends. O. Velev, T, Gurkov, R. Alargova, K. Marinova, I. B. Ivanov, R. Borwankar, Proc. First World Congress in Emulsion, Paris, 1993.

 

1991

1. Multi-Stepwise Drainage and Viscosity of Macroscopic Films Formed from Latex Suspensions. E.S. Basheva, A.D. Nikolov, P.A. Kralchevsky, I.B. Ivanov, D.T. Wasan, in: "Surfactants in Solution", K.L. Mittal, D.O. Shah, Eds., Vol. 11, Plenum Press, New York, 1991, p. 467-479.

 

1990

1. Drainage of Foam Films in the Presence of Nonionic Micelles. A.D. Nikolov, D.T. Wasan, N.D. Denkov, P.A. Kralchevsky, I.B. Ivanov, Progress in Colloid and Polymer Science 82 (1990) 87-98.

2. The Role of the Surfactant Distribution on the Lifetime of Drops in the System Water/Nitroethane. S.K. Chakarova, M. Dupeyrat, E. Nakache, C.D. Dushkin, I.B. Ivanov, J. Surface Sci. Technol., 6(3) (1990) 201-215.

 

1988

1. Marginal Stability of Emulsion Thin Films. K. Danov, I.B. Ivanov, Z.Z. Zapryanov, E. Nakache and S. Raharimalala, In: "Synergetics, Order and Chaos", M.G. Velarde (Ed), World Scientific, London, (1988) 178-192.

2. Mass Transport Effects on the Stability of Emulsion Films with Acetic Acid and Acetone Diffusing across the Interface. B. Dimitrova, I.B. Ivanov and E. Nakache, J. Dispersion Science and Technology, 9 (4) (1988) 321-341.

3. Thin Film Drainage. I.B. Ivanov and D.S. Dimitrov, Chapter 7 in "Thin Liquid Films" (I.B. Ivanov, Ed.), M. Dekker, New York, 1988.

 

1987

1. Instability of Emulsion Liquid Films Induced by the Transfer of Acetic Acid. I. B. Ivanov, Sv. K. Chakarova, B. I. Dimitrova, Colloids and Surfaces 22 (1987) 311-316.

 

1985

1. On the Mechanical Equilibrium between a Film of Finite Thickness and the External Meniscus. P. A. Kralchevsky and I. B. Ivanov, Chem. Phys. Letters 121 (1985) 111-116.

2. The Transition Region between a Thin Film and the Capillary Meniscus. P. A. Kralchevsky and I. B. Ivanov, Chem. Phys. Letters 121 (1985) 116-121.

3. Thinning of Films with Deformable Surfaces: Diffusion-Controlled Surfactant Transfer. I. B. Ivanov, D. S. Dimitrov, P. Somasundaran and R. K. Jain, Chem. Eng. Sci. 40 (1985) 137-150.

4. Washing Action and Dynamic Surface Tension. L. Petrova, J. Radkov, E. Basheva, A. D. Nikolov, VI Internationale Tagung uber Grenzflachenaktive Stoffe, Bad Stuer, 1985.

 

1984

1. Influence of Permeability on the Rate of Mutual Approach of Membranes. D. S. Dimitrov, I. B. Ivanov and T. T. Traykov, Journal of Membrane Science 17 (1984) 79-87.

 

1980

1. Effect of Surface Mobility on the Dynamic Behavior of Thin Liquid Films, I.B. Ivanov, Pure and Applied Chemistry 52 (1980) 1241-1262.

 

1978

1. Hydrodynamics of Thin Liquid Films. On the Rate of Thinning of Microscopic Films with Deformable Interfaces, D.S. Dimitrov and I.B. Ivanov, J. Coll. Interface Sci. 64 (1978) 97.

2. Hydrodynamics of Thin Liquid Films. Rate of Expansion of the Perimeter of the Three-phase Contact, I.B. Ivanov, D.S. Dimitrov and B.P. Radoev, J. Colloid Interface Sci. 63 (1978) 166.

 

1977

1. Hydrodynamics of Thin Liquid Films. Effect of Surfactants on the Velocity of Thinning of Emulsion Films, T.T. Traykov and I.B. Ivanov, International Journal of Multiphase Flow 3 (1977) 471-483.

2. Hydrodynamics of Thin Liquid Films. Experimental Investigation of the Effect of Surfactants on the Drainage of Emulsion Films, T.T. Traykov, E.D. Manev and I.B. Ivanov, International Journal of Multiphase Flow 3 (1977) 485-494.

 

1976

1. Hydrodynamics of Thin Liquid Films. Effect of Surface Diffusion on the Rate of Thinning of Foam Films, E. Manev, Chr. Vassilieff and I.B. Ivanov, Colloid and Polymer Sci. 254 (1976) 99-102.

 

1974

1. Hydrodynamics of Thin Liquid Films. Effect of the Surfactant on the Rate of Thinning, B.P. Radoev, D.S. Dimitrov and I.B. Ivanov, Colloid and Polymer Sci. 252 (1974) 50-55.

2. Hydrodynamics of Thin Liquid Films. Effect of Surface Viscosity on Thinning and Rupture of Foam Films, I.B. Ivanov and D.S. Dimitrov, Colloid and Polymer Sci. 252 (1974) 982-990.

 

1970

1. The Theory of the Critical Thickness of Thin Liquid Films, I.B. Ivanov, B.P. Radoev, E. Manev and A. Scheludko, Trans. Faraday. Soc., 66 (1970) 1262-1273.