نتایج جستجو برای: استوانه ورودی شبیهسازی cfd

تعداد نتایج: 34262  

میدان فشار ناپایا روی سطح استوانه‌ای با مقطع دایره‌ای، به عنوان منشا اصلی نویز ثبت شده در دوردست، دارای رفتار فیزیکی پیچیده‌ای بوده که تاکنون مطالعات مختصری روی آن و مخصوصا در جریان آزاد آشفته انجام گرفته است. بنابراین در مطالعه حاضر نوسانات فشار ناپایا روی سطح استوانه‌ای با قطر خارجی mm22 تحت شرایط جریان آزاد آرام و آشفته بطور تجربی بررسی شده است. تغییر شرایط آشفتگی جریان آزاد با استفاده از شب...

2017
Chen Qian Shaoqing Ju Jing Qi Jianmei Zhao Xianjuan Shen Rongrong Jing Juan Yu Li Li Yingjuan Shi Lurong Zhang Zhiwei Wang Hui Cong

Gastric cancer (GC) is the fourth most common cancer and the second major cause of cancer-related deaths worldwide. In our previous study, a novel and sensitive method for quantifying cell-free DNA (CFD) in human blood was established and tested for its ability to predict patients with tumor. We want to investigate CFD expression in the sera of GC patients in an attempt to explore the clinical ...

KATAPAK-S is a type of structured catalytic packing, which is used in reactive distillation processes. The dry pressure drop characteristic (the pressure drop in the absence of liquid flow) is of significant importance for the investigation of process hydrodynamics. In this paper, the dry pressure drop within the catalyst packed channels of KATAPAK-S has been investigated using Computational Fl...

Journal: :CoRR 2016
Chaoyang Jiang Yeng Chai Soh Hua Li Mustafa K. Masood Zhe Wei Xiaoli Zhou Deqing Zhai

Current CFD calibration work has mainly focused on the CFD model calibration. However no known work has considered the calibration of the CFD results. In this paper, we take inspiration from the image editing problem to develop a methodology to calibrate CFD simulation results based on sparse sensor observations. We formulate the calibration of CFD results as an optimization problem. The cost f...

2017
Yasuyuki Umeda Fujimaro Ishida Masanori Tsuji Kazuhiro Furukawa Masato Shiba Ryuta Yasuda Naoki Toma Hiroshi Sakaida Hidenori Suzuki

OBJECTIVE This study aimed to predict recurrence after coil embolization of unruptured cerebral aneurysms with computational fluid dynamics (CFD) using porous media modeling (porous media CFD). METHOD A total of 37 unruptured cerebral aneurysms treated with coiling were analyzed using follow-up angiograms, simulated CFD prior to coiling (control CFD), and porous media CFD. Coiled aneurysms we...

2014
Gad Shaked Amos Douvdevani Silvia Yair Alexander Zlotnik David Czeiger

BACKGROUND Traumatic brain injury (TBI) is a major cause of death and disability. In this study a new method to measure cell free DNA (CFD) for the management of TBI is tested. Our hypothesis was that CFD concentrations correlate to the magnitude of brain damage, and may predict the outcome of injured patients. METHODS Twenty eight patients with isolated head injury were enrolled. Their demog...

2001

Extensive testing with a plasma torch operating on methane in a supersonic crossflow sparked an interest in modeling the torch using CFD to determine if methane plasma jets can be accurately modeled, and if so, to ascertain the usefulness of such results. The comparison presented here is of a methane plasma jet produced by a normally oriented plasma torch in a Mach 2.4 crossflow and the corresp...

2006
Zhiqiang Zhai Qingyan Chen

Energy simulation (ES) and computational fluid dynamics (CFD) provide important and complementary information for building energy and indoor environment designs. A coupled ES and CFD simulation can eliminate many assumptions employed in the separate ES and CFD computations and thus provide more accurate results. Through theoretical analysis and numerical experiment, this study verified that the...

2004
V N Vatsa S A Viken

A CFD validation workshop for synthetic jets and turbulent separation control CFD VAL was held in Williamsburg Virginia in March Three cases were inves tigated synthetic jet into quiescent air synthetic jet into a turbulent boundary layer cross ow and ow over a hump model with no ow control steady suction and oscilla tory control This paper is a summary of the CFD results from the workshop Alth...

2016
No-Joon Song Suji Kim Byung-Hyun Jang Seo-Hyuk Chang Ui Jeong Yun Ki-Moon Park Hironori Waki Dean Y. Li Peter Tontonoz Kye Won Park

Adipocytes are differentiated by various transcriptional cascades integrated on the master regulator, Pparγ. To discover new genes involved in adipocyte differentiation, preadipocytes were treated with three newly identified pro-adipogenic small molecules and GW7845 (a Pparγ agonist) for 24 hours and transcriptional profiling was analyzed. Four genes, Peroxisome proliferator-activated receptor ...

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