An Intergrid Boundary Reconnection Technique for Conservative Unstructured Overset Mesh Scheme

Jung, Mun Seung; Kwon, Oh Joon; problems, simulations of time-accurate un-steady ﬂows involving multiple bodies in relative motion are frequen; problems, overset mesh technique has been regarded as the most prominentapproach. In spite of the successful a; techniques, several practical problems still exist for overset meshmethods. For conventional overset mesh; interpolation, transfer of ﬂow variables be-tween mesh blocks is achieved through; problem, therefore conservationof ﬂuxes is usually not guaranteed across the overset mesh block boundary. Be-; study, numerical difﬁculties arise when severe ﬂow gradients suchas shock wave or massively separated ﬂow e; theefﬁcient, a conservative overset mesh scheme is proposed for; procedure, accurate numerical simulation of unsteady time-accurate ﬂows aroundmultiple bodies in relative motio; step, all overset mesh blocks are connected instantaneously ateach time; satisﬁed, can be treated as a single block. Thus the conservation propertyof ﬂow over the global computational; motion, even whenthe objects are in an arbitrary relative; mass, without any spurious; momen-tum,; purpose, energy production from inside of the ﬂow domain. For this; efﬁciency, anintergrid boundary reconnection technique is developed to enhance the; movement, the robustness of generating new elements inside the blank region. In the caseof the ﬂow problems wi; a, the overset mesh blocks reduces to single block unstructured mesh.Appliction of the present intergri; Fig., the results are presented in; Fig., the store indepen-dently as shown in; is, a non-overlapping blank region

doi:10.3970/icces.2009.011.077

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ABSTRACT

An Intergrid Boundary Reconnection Technique for Conservative Unstructured Overset Mesh Scheme

Mun Seung Jung¹, Oh Joon Kwon²

1 Graduate Research Assistant, Department of Aerospace Engineering, Korea Advanced Instituteof Science and Technology(KAIST) Daejeon 305-701, Repubic of Korea
2 Corresponding Author. Professor, Department of Aerospace Engineering, Korea AdvancedInstitute of Science and Technology(KAIST) Daejeon 305-701, Repubic of Korea (Email) ojk-won@kaist.ac.kr. (Phone) +8242-350-3720, (Fax) +8242-350-3710.

An Intergrid Boundary Reconnection Technique for Conservative Unstructured Overset Mesh Scheme

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