کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
708399 1461097 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Typical bubble shape estimation in two-phase flow using inverse problem techniques
ترجمه فارسی عنوان
برآورد شکل حباب معمولی در جریان دو فازی با استفاده از تکنیک های معکوس
کلمات کلیدی
جریان دو مرحله ای، تجسم جریان، برآوردگر متوسط، برآوردگر متوسط، تراکم طیفی قدرت مشکلات معکوس، تنوع کامل
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی

Two-phase flow models predict different arrangements of gas and liquid, which include the formation of bubbles, slugs and aerated areas. Thus, flow visualization plays a central role in development and refinement of models. Recently, high-speed cameras have enabled the recording of these flows and the challenge is often to extract relevant information from large amounts of data.This paper analyzes and proposes some schemes to estimate a typical bubble based on flow images. The key idea is to find a bubble image that represents and characterizes the flow conditions. As we show, using simple mean as estimator does not yield meaningful images and can be successfully replaced by median. Finally, observing the power spectral density of individual bubble images, we propose an inverse problem regularizer combined with total variation penalization, which significantly improves image quality and sharpens bubble boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flow Measurement and Instrumentation - Volume 40, December 2014, Pages 64–73
نویسندگان
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