Hareketli Ve Sabit Cisimler İçin Ağ Yama Yöntemi

Year 2017, Volume: 21 Issue: 4, 592 - 603, 01.08.2017

Erdal Yılmaz

https://doi.org/10.16984/saufenbilder.309643

Abstract

Bu çalışmada  hareketli nesneler etrafında birbiri ile
örtüşen çözüm ağlarını içeren problemler için az çaba ile üretilebilen ve
yaygın olabilecek bir yöntem önerilmiş ve uygulanmıştır. Örtüşen çözüm ağ
blokları dikiş atma yöntemi kullanılarak, ağ hücre büyüklerini dikkate almak
suretiyle yumuşak yama bandı oluşturularak birleştirilmiştir. Çözüm
değerlerini aktarırken interpolasyon yapmaya ihtiyaç duyulmamaktadır. Bu
sebeple, mevcut yöntem benzer chimera yöntemine göreceli bir avantaj
sağlamaktadır. Yunuslama hareketi yapan bir kanat profile etrafındaki akış, bu
yöntemi göstermek için kullanılmıştır. Diğer test problemleri ise bu çalışmaya
özel olarak deneme amacıyla oluşturulmuş birbirine göre hareket eden çoklu
kanat profile ile uçaktan ayrılan bir nesneye benzetim yapmaktadır.

Keywords

yapısal olmayan çözüm ağı, ağ dikme, ağ uyumlandırma, hareketli ağlar, ağ adaptasyonu

Mesh Stitching Method For Moving And Stationary Bodies

Abstract

An efficient and versatile mesh method
is suggested and implemented for problems involving individual overlapping mesh
blocks around moving objects. The overlapped mesh blocks are combined using a
stitching stripe, which considers smooth transition of the mesh element size
between the blocks. Interpolation of the flow values between the mesh blocks is
not needed. This is considered as a relative advantage of this method compared
to the overset mesh method. Unsteady flow around an oscillating body test case
is used to demonstrate applicability of this method. Other test cases include
hypothetical multiple flapping airfoils in relative motion and store separation
from a store bay.

Keywords

unstructured mesh, mesh stitching, moving mesh, grid adaptation, grid stitching

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