Dr Csaba Sinka

Dr Csaba Sinka

Associate Professor

T: +44 (0)116 252 2555
E: ics4@le.ac.uk

Location: Room 220, Michael Atiyah Building

My area of research is the mechanics of granular and porous materials with applications to particle science and engineering. My work combines experimental characterisation, numerical analysis and theoretical research covering the following four themes: powder compaction, powder flow and die fill, particle transformations during processing, and formulation of complex products.

Grants (PI)

EPSRC EP/N025261/1 Virtual Formulation Laboratory for prediction and optimisation of manufacturability of advanced solids based formulations. 2017-2020. £1.7m.

Completed PhD projects (1st supervisor)

  1. Hasan Elmsahli. A numerical investigation into particle interactions and transformations using coupled DEM-CFD-PBM modelling, 2018.
  2. Amnani Binti Shamjuddin. Swelling and disintegration of multi-component polymeric structures, 2018.
  3. Muhanad Al-Sabbagh. Influence of contact strength between particles on the constitutive law for powder compaction, 2018.
  4. Dr. Lida Che. Numerical constitutive laws for powder compaction, 2017.
  5. Dr. Reza Baserinia. Flow of fine and cohesive powders under controlled air pressure conditions, 2016.
  6. Dr. Chenglong Shang. Modelling powder compaction and breakage of compacts, 2012.

Selected publications

  • Baserinia R. and Sinka I.C., 2018. Mass flow rate of fine and cohesive powders under differential air pressure. Powder Technology. Vol. 334, pp. 173-182.
  • Baserinia R., Sinka I.C. and Rajniak P., 2016. Air pressure effects on powder flow initiation in orifice flow. Powder Technology. Vol. 301, pp. 493-502.
  • Sinka I.C., 2014. A model for the deformation of an ellipsoid subject to a large number of successive impacts with special reference to spheronisation. Powder Technology. Vol. 270, Part B, pp. 592-598.
  • Shang C., Sinka I.C. and Pan J., 2013. Modelling of the break force of tablets under diametrical compression. International Journal of Pharmaceutics. Vol. 445, Issues 1–2, pp. 99-107.
  • Shang C., Sinka I.C., Jayaraman B. and Pan J., 2013. Break force and tensile strength relationships for curved faced tablets subject to diametrical compression. International Journal of Pharmaceutics. Vol. 442, Issues 1–2, pp. 57-64.
  • Shang C., Sinka I.C., Pan J., 2012. Constitutive model calibration for powder compaction using instrumented die testing. Experimental Mechanics. Vol. 52, Issue 7, pp. 903-916.

Research interests

A wide range of goods are manufactured by die compaction of powders. A major theme in my research is related to improving the fundamental understanding of the mechanics of powder and particulate materials and developing appropriate constitutive laws for the processes involved. My active research areas are highlighted in green.

Dr Csaba Sinka

1. Powder flow

The details of the delivery process of powder into the die are important for achieving weight and content uniformity. A model shoe-die facility and high speed video system enabled a 
detailed study of the powder-air interaction and air pressure build-up during powder flow into constrained cavities:

Dr Csaba Sinka - image 3 - constrained cavities

The experimental facility is used to assess the flowability of powders, assist powder formulation design and selection of process parameters relevant to single station presses as well as high speed rotary presses.


2. Compaction
The behaviour of particulate materials depends on the details of particle-particle interactions which involve elastic and plastic deformation and fracture.

• Theoretical tools (micromechanical models)
• Numerical modelling (material point method for particle impact)
• Experimental facilities (state of the art 700 MPa capacity triaxial testing system):

Dr Csaba Sinka - image 4 - model a Dr Csaba Sinka - image 4 - model b

The constitutive models developed are implemented into finite element packages for practical applications.

3. An integrated approach to powder compaction
The relationships between material properties, process parameters and product performance is investigated through the development of an integrated process model developed for 
the manufacturing of pharmaceutical solid dosage forms.

The process model supports rational product, process and tool design.

Dr Csaba Sinka - image 5 - product, process and tool design



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