TY - JOUR
T1 - Magnetohydrodynamic flow of liquid-metal in circular pipes for externally heated and non-heated cases
AU - Altintas, A.
AU - Ozkol, I.
PY - 2015
Y1 - 2015
N2 - The Computational Fluid Dynamics (CFD) study of external magnetic field effect on the steady, laminar, incompressible flow of an electrically conducting liquid-metal fluid in a pipe has been performed. The MHD Module of ANSYS Fluent commercial programme has been used to compute the flow and temperature fields. Na22K78 (sodium potassium) alloy has been used as operating fluid, which is liquid in room temperature. The simulations are performed for two different cases, first a non-heated pipe flow and secondly an externally heated pipe flow. For both cases, three different magnitude uniform external magnetic field, B0, applied (which are B0 = 0.5 T, 1.0 T and 1.25 T, T represents Tesla). The results are compared for the MHD effect on the flow variables in two cases separately, but also compared for heated and non-heated cases in order to analyze the temperature effect on MHD flows, as well. It is observed that heating is reducing the magnetic effect on the flow field. While in non-heated cases it is observed that very well-known slowing down effect of MHD on fluid flow, in heated case the velocity field shows a tendency to behave as if it were MHD is not applied. Towards the end of the physical length the heating seems dominating the MHD effect. It is shown that in heated case temperature differences and entropy differences are in tendency to behave as if it were MHD is not applied.
AB - The Computational Fluid Dynamics (CFD) study of external magnetic field effect on the steady, laminar, incompressible flow of an electrically conducting liquid-metal fluid in a pipe has been performed. The MHD Module of ANSYS Fluent commercial programme has been used to compute the flow and temperature fields. Na22K78 (sodium potassium) alloy has been used as operating fluid, which is liquid in room temperature. The simulations are performed for two different cases, first a non-heated pipe flow and secondly an externally heated pipe flow. For both cases, three different magnitude uniform external magnetic field, B0, applied (which are B0 = 0.5 T, 1.0 T and 1.25 T, T represents Tesla). The results are compared for the MHD effect on the flow variables in two cases separately, but also compared for heated and non-heated cases in order to analyze the temperature effect on MHD flows, as well. It is observed that heating is reducing the magnetic effect on the flow field. While in non-heated cases it is observed that very well-known slowing down effect of MHD on fluid flow, in heated case the velocity field shows a tendency to behave as if it were MHD is not applied. Towards the end of the physical length the heating seems dominating the MHD effect. It is shown that in heated case temperature differences and entropy differences are in tendency to behave as if it were MHD is not applied.
KW - Entropy
KW - Heat flux
KW - Liquid-metal
KW - MHD flow
KW - Pipe
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=84929417061&partnerID=8YFLogxK
U2 - 10.18869/acadpub.jafm.67.222.22862
DO - 10.18869/acadpub.jafm.67.222.22862
M3 - Article
AN - SCOPUS:84929417061
SN - 1735-3572
VL - 8
SP - 507
EP - 514
JO - Journal of Applied Fluid Mechanics
JF - Journal of Applied Fluid Mechanics
IS - 3
ER -