The Taylor-Dean flow through a curved duct of square cross section

in which walls of the duct except the outer wall rotate around the center of curvature and an azimuthal pressure gradient is imposed

is investigated numerically using the spectral method.The calculation covers a wide range of pressure gradient and duct rotational speed.The steady flow patterns of the induced secondary flow through the duct are obtained.The analysis based on the linear stability is also carried out.