Skip to main content
Log in

Unsteady slip flow in an electrically conducting two-phase fluid under transverse magnetic fields

Нестационарное течение скольжения в электрически проводящей двухфазовой жидкости в скрещенных магнитных полях.

  • Published:
Il Nuovo Cimento B (1971-1996)

Summary

A study is made of the unsteady motion of an electrically conducting two-phase fluid in the presence of a uniform magnetic field using the slip boundary condition and modified initial conditions so as to satisfy the free molecular flow condition at the beginning of the motion. An asymptotic analysis is carried out to determine the solutions of the flow field for small mass concentration, small and large times. The principal features of the boundary layer solutions are discussed with physical implications. It is shown that the asymptotic solutions for large time are modified by the external magnetic field and the mass concentration of the particles. Several limiting situations of physical interest are also investigated.

Riassunto

Si è fatto uno studio del moto non stazionario di un fluido a due fasi elettricamente conduttore in presenza di un campo magnetico uniforme usando la condizione del limite di scorrimento e le condizioni iniziali modificate in modo da soddisfare la condizione del libero flusso molecolare all'inizio del moto. Si è effettuata un'analisi asintotica per determinare le soluzioni del campo di flusso per piccole concentrazioni di massa e per piccoli e grandi tempi. Si sono discusse con implicazioni fisiche le caratteristiche principali delle soluzioni dello strato limite. Si dimostra che le soluzioni asintotiche per grandi tempi si modificano per mezzo del campo magnetico esterno e per la concentrazione della massa delle particelle. Si sono anche studiate alcune situazioni limite di interesse fisico.

Резюме

Проводится исследование нестационарного движения электрически проводящей двухфазовой жидкости в присутствии однородного магнитного поля, используя граничные условия скольжения и модифицированные начальные условия, чтобы удовлетворить условию свободиого молекулярного течения в начале движения. Проводится асимптотический анализ, чтобы определить решения для поля потока в случае малой концентрации массы, малых и больших времен. Обсуждаются основные особенности решений для пограничного слоя и рассматриваются физические следствия. Показывается, что асимптотические решения для больших времен изменяются во внешнем магнитном поле и при наличии массовой концентрции частиц. Также исследуются некоторые предельные ситуации, представляющие физический интерес.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. P. G. Saffman:Journ. Fluid Mech.,13, 120 (1962).

    Article  MathSciNet  ADS  MATH  Google Scholar 

  2. D. H. Michael andD. A. Miller:Mathematika,3, 97 (1966).

    Article  Google Scholar 

  3. D. H. Michael:Journ. Fluid Mech.,31, 175 (1968).

    Article  ADS  Google Scholar 

  4. J. T. C. Liu:Astronautica Acta,13, 369 (1967).

    Google Scholar 

  5. J. V. Healy andH. T. Yang:Zeits. Angew. Math. Phys.,21, 454 (1970).

    Article  MATH  Google Scholar 

  6. J. V. Healy andH. T. Yang:Astronautica Acta,17, 851 (1972).

    Google Scholar 

  7. S. A. Schaaf:A note on the flat plate drag coefficient, University of California, Institute of Engineering Research, HE-150-66 (1950).

  8. H. T. Yang andL. Lees:Rayleigh problem at low Reynolds number according to the kinetic theory of gas, inProceedings of the First International Symposium on Rarefied Gas Dynamics, Nice, 1958 (London, 1960), p. 201.

  9. E. P. Gross andE. A. Jackson:Phys. Fluids,1, 318 (1958).

    Article  MathSciNet  ADS  MATH  Google Scholar 

  10. Y. Stone:Journ. Phys. Soc. Japan,19, 1463 (1964).

    Article  ADS  Google Scholar 

  11. E. P. Russo andO. A. Arnas:Journ. Appl. Mech.,34, 837 (1967).

    Article  ADS  Google Scholar 

  12. C. Cercignani andF. Sernagiotto:Rayleigh problem at low Mach number according to kinetic theory, inProceedings of the Fourth International Symposium on Rarefied Gas Dynamics, Toronto, 1964, Vol. 1 (New York, N. Y., 1965), p.332.

  13. K. C. Reddy:Journ. Appl. Mech.,34, 833 (1967).

    Article  ADS  Google Scholar 

  14. V. J. Rossow:Phys. Fluids,4, 552 (1960).

    MathSciNet  Google Scholar 

  15. H. T. Yang:Rayleigh problem in a transverse magnetic field, Report of Institute for Fluid Dynamics and Applied Mathematics, University of Maryland, December 1958.

  16. C. C. Chang andJ. T. Yen:Phys. Fluids,2, 393 (1959).

    Article  MathSciNet  ADS  Google Scholar 

  17. G. Nath:Appl. Sci. Res.,23, 315 (1970).

    Article  Google Scholar 

  18. J. V. Healy andH. T. Yang:Appl. Sci. Res.,21, 387 (1973).

    Google Scholar 

  19. M. C. Baral:Journ. Phys. Soc. Japan,25, 1701 (1968).

    Article  ADS  Google Scholar 

  20. V. V. Ramana Rao andD. Rama Murty:Journ. Phys. Soc. Japan,33, 1732 (1972).

    Article  ADS  MATH  Google Scholar 

  21. G. A. Campbell andR. M. Foster:Fourier Integrals for Practical Applications (New York, N. Y., 1948).

Download references

Author information

Authors and Affiliations

Authors

Additional information

Traduzione a cura della Redazione.

Передевено ребакцией.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Debnath, L., Basu, U. Unsteady slip flow in an electrically conducting two-phase fluid under transverse magnetic fields. Nuovo Cim B 28, 349–362 (1975). https://doi.org/10.1007/BF02726662

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02726662

Navigation