The Institute of Aeroelasticity, together with the Institute of Aerodynamics and Flow Technology, is developing the linear frequency domain (LFD) solver in TAU. On the basis of a previously determined conventional steady solution, and given a separation amplitude field, this method enables the direct calculation of a complete complex-valued interference flow field or a complex interfering pressure distribution on a surface oscillating with constant frequency. A requirement of the LFD method is that it always delivers exactly the same solution as the conventional time domain solver (TAU TD) for the special case of small interferences.
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