The present investigation constitutes CFD analysis of the heat transmission phenomenon in a tube exchanger with Y-shaped insert triangular perforation. is accomplished by considering air as working fluid Reynolds number ranging from 3000 to 21,000. segment considered for consists circular 68 mm diameter and 1.5 m length. geometrical parameter perforation index (0%, 10%, 20%, 30%). constant flux...

Evaporators used in organic Rankine cycles (ORC) are designed using existing flow boiling correlations that mainly based on HVAC&R data. However, the ORC evaporators employed industry typically have larger diameters and operational conditions at higher reduced pressures compared to applications. The present study presents results of heat transfer experiments representative for an industrial...

Heat transfer enhancement (HTE) efforts spent during the last half-century have become one of most important working areas researchers from both academia and industry. One popular passive methods, with regard to price-performance ratio, is place wire coils in a pipe or duct. In this study, heat pressure drop characteristics diamond, triangular, circular cross-sectional (DWC, TWC, CWC) square du...

A critical point of nasogastric feeding tube placement, potentially resulting in an unsafe and/or non-effective operation of the device, is the monitoring of its proper placement into the stomach. A properly obtained and interpreted radiograph is currently recommended to confirm placement. We reported the case of a 68-year-old demented woman referred for complicated dysphagia. A nasogastric tub...

The use of nasogastric tube is desirable for the short-term administration of calories when oral feeding is not possible. Although the insertion of nasogastric tubes has been described as being easy this is not without risks. An unusual case of malpositioning of a fine bore nasogastric tube into both main bronchi in a patient that was awake is reported. Respiratory complications of misplaced na...

INTRODUCTION The collected and shipped blood samples are exposed to a various extra-analytical factors prior to analysis. The aim of the study was to determine the stability of analytes in serum gel tubes and plain tubes exposed to a range of storage temperatures and times after centrifugation. MATERIALS AND METHODS Fifteen healthy volunteers were recruited and venous blood was collected into...

A 19-yr-old adolescent, who was hospitalized because of pelvic inflammatory disease (PID) due to Chlamydia trachomatis, developed bile-stained emesis. A mild amount of free fluid in the pelvis was found on abdominal ultrasound but there was no sonographic evidence of a pelvic mass or of a tubo-ovarian abscess. Plain radiography and computer tomography (with contrast) of the abdomen revealed a h...

Even with the recent extensive study into superhydrophobic surfaces, the fabrication of such surfaces on the inside walls of a pipe remains challenging. In this work we report a convenient bi-layered pipe design using a thin superhydrophobic metallic mesh formed into a tube, supported inside another pipe. A flow system was constructed to test the fabricated bi-layer pipeline, which allowed for ...

The objective of current study was to compare the efficacy of denture cleansers and to find out the most efficacious denture cleanser against Candida. This randomized control trial study with sample size eighty was conducted at Prosthodontic Department de,Montmorency College of Dentistry, Lahore, Microbiological test were performed at PGMI Lahore from Febuary 2003 to October 2003. Patients who ...

1 of 2 DESCRIPTION A 79-year-old man was admitted with a 3 day history of profuse vomiting. Plain chest x-ray on admission showed an elevated right hemidiaphragm. The abdominal fi lm was within normal limits. A nasogastric tube was inserted and the patient was rehydrated. Subsequent CT of chest and abdomen demonstrated an anterior diaphragmatic hernia with the antrum, body and pylorus of stomac...