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Nikolina Todorova Kovacheva

Position: Research associate

Department: Complex and Multiphase Flow

Room number: 324

Phone: +359 2 9796454



Scientific degrees, institution, year:


Doctor in mathematics, Bulgarian Academy of Sciences – Sofia University “Sveti Kliment Ohridski”, 1992

Fields of Research:


Fluid Mechanics, Heat/Mass Transfer

Extended Information


Recent Publications:


  1. A.I. Zhurov, N. Kovacheva, Linear Shear Flow around Porous Sphere, 10th Jubilee National Congress on Theoretical and Applied Mechanics, Varna 13-16 September 2005, pp.642-647

  2. Toshev, E. and Kovacheva, N., Hydrodynamic Interaction between Solid Spherical Particle and Solid Wall, 9th Workshop on Transport Phenomena in Two-phase Flow, Borovetz, Bulgaria, pp.63-68, 2004.

  3. Polyanin, A.D., Zhurov, A.I., and Kovacheva, N.T., Structure of the Solutions of Linear Nonhomogeneous Heat and Mass Transfer Problems, Journal of Theoretical and Applied Mechanics, Sofia, vol.33, No.1, pp.29-44, 2003.

  4. Kovacheva, N.T., Secondary Streaming Generated by the High-Frequency Translational Oscillations of the Inner Sphere in Eccentric Spherical Annuli, Proc. of the 9th National Congress on Theoretical and Applied Mechanics, 19-22 September 2001, vol. 2, pp.36-41.

Some works published in Acta Mechanica and ZAMM:


  1. Kovatcheva, N.T., and Roesner, K.G., Investigation of Secondary Flows Around Oscillating Bodies Using Computer Algebra, ZAMM (Z. angew. Math. Mech.), v.75, SII, pp.535-536, 1995.

  2. Kovatcheva, N.T., Polyanin, A.D., and Kurdjumov, V.N., Mass Transfer from a Particle in a Shear Flow with Surface Reactions, Acta Mechanica 101, pp.155-160, 1993.

  3. Kovatcheva, N.T., and Polyanin, A.D., Convective Diffusion of Particles in a Viscous Liquid with a Variable Diffusion Coefficient, Trends in Applications of Mathematics to Mechanics (Proc. 8th Symposium on "Trends in Applications of Mathematics to Mechanics", Hollabrunn, Austria, 1989) edited by Wilhelm Schneider, Hans Troger, Franz Ziegler, Longman Scientific & Technical, pp.158-162, 1991 (copublshed in the United States with John Wiley & Sons, Inc., New York).

  4. Kovatcheva, N.T., Polyanin, A.D., and Zapryanov, Z.D., The Change of the Diffusivity with the Change of the Concentration of the Solvent in a Solution,. Acta Mechanica 80, pp.259-272, 1989

  5. Kovatcheva, N.T., Christov, Ch.I., and Zapryanov, Z.D., Secondary Streaming for the High-Frequency Viscous Flow in Eccentric Spherical Annuli, ZAMM (Z. angew. Math. Mech.), v.68, No.2, pp.121-125, 1988.


Recent Projects:

Modeling and numerical simulation in multiphase media with rigid particles and bubbles ( connected with a modeling and optimization of the technological processes as flotation, separation and fluidization of the rigid particles).

Membership: EUROMECH


Modified date:27-12-2015