Impinging jets are used in various in cooling and drying technique. The current research the means of improving the heat transfer for con minimum distance of the nozzle to the impingem impingement heat transfer is described using nume a wide range of parameters for an array of p parameters include varying jet flow speed, width o of nozzle, angle of the jet flow, velocity and impingement surface...

This study investigates drop impingement on highly wetting porous films and papers. Experiments reveal previously unexplored impingement modes on porous surfaces designated as necking, spreading, and jetting. Dimensional analysis yields a nondimensional parameter, denoted the Washburn-Reynolds number, relating droplet kinetic energy and surface energy. The impingement modes correlate with Washb...

The diagnosis of coracoclavicular articulation was made in an elderly woman, who complained of bilateral anterior shoulder pain with impingement. This congenital pseudo-articulation is rarely symptomatic and is usually an incidental radiological finding. Surgical excision of the prominent bony projection, arising from the inferior surface of the clavicle at the level of the coracoid process, re...

Groin problems in sports can be multifactorial and often a team approach between orthopaedic, general surgeons is required for both diagnosis and treatment. Both clinical disciplines can be the first point of contact for athletes looking for medical advice. Good communication between the members of a medical team looking after an athlete is essential and is not helped by the use of confusing te...

Posteromedial ankle impingement is rare and uncommonly associated with a fracture. Bone resection of the fragment is the recommended treatment. In this report, we describe the step-by-step surgical technique of arthroscopic resection of a malunion of a posteromedial talus fracture to correct the impingement.

Ankle impingement is a syndrome that encompasses a wide range of anterior and posterior joint pathology involving both osseous and soft tissue abnormalities. In this review, the etiology, pathoanatomy, diagnostic workup, and treatment options for both anterior and posterior ankle impingement syndromes are discussed.

PURPOSE The purpose of this study was to identify possible causes of failure of hip arthroscopy by reviewing the intraoperative and radiologic findings in a series of patients requiring revision hip arthroscopy. METHODS We retrospectively reviewed 24 revision hip arthroscopy cases performed in 23 patients (14 female and 9 male; mean age, 33.6 years; 1 bilateral). The review included indicatio...

BACKGROUND One possible cause of shoulder pain is rotator cuff contact with the superior glenoid (cuff-glenoid contact) with the arm in flexion, as occurs during a Neer impingement sign. It has been assumed that the pain with a Neer impingement sign on physical examination of the shoulder was secondary to the rotator cuff making contact with the anterior and lateral acromion. QUESTIONS/PURPOS...

BACKGROUND/HYPOTHESIS Shoulder pain in elite swimmers is common, and its pathogenesis is uncertain. HYPOTHESIS/STUDY DESIGN: The authors used a cross-sectional study design to test Jobe's hypothesis that repetitive forceful swimming leads to shoulder laxity, which in turn leads to impingement pain. METHODS Eighty young elite swimmers (13-25 years of age) completed questionnaires on their swim...

In shoulder arthroplasty, malpositioning of prostheses often leads to reduced postoperative range of motion (ROM) and complications such as impingement, loosening, and dislocation. Furthermore, the risk of impingement complications increases when reverse total prostheses are used. For this purpose a pre-operative planning system was developed that enables surgeons to perform a virtual shoulder ...